Add a log message when a project is scheduled for destruction for debugging

We have a lot of projects that are in `pending_delete` state. It's not clear whether they were ever scheduled for destruction, or whether Sidekiq just dropped the job due to `MemoryKiller` or some other reason.

Also this will provide a record of which user destroys a project.

#20365 

See merge request !5540

Implement #3243 New Issue by email

So we extend Gitlab::Email::Receiver for this new behaviour,
however we might want to split it into another class for better
testing it.

Another issue is that, currently it's using this to parse project
identifier:

    Gitlab::IncomingEmail.key_from_address

Which is using:

    Gitlab.config.incoming_email.address

for the receiver name. This is probably `reply` because it's used
for replying to a specific issue. We might want to introduce another
config for this, or just use `reply` instead of `incoming`.

I'll prefer to introduce a new config for this, or just change
`reply` to `incoming` because it would make sense for replying to
there, too.

The email template used in tests were copied and modified from:
`emails/valid_reply.eml` which I hope is ok.

/cc @DouweM #3243

See merge request !3363

Merge branch '20308-fix-title-that-is-show-in-the-dropdown-toggle-button-on-projects-branches' into 'master'

Fix the title of the toggle dropdown button

## What does this MR do?

Fix the dropdown-button toggle displaying the correctly title.

## Are there points in the code the reviewer needs to double check?

See if the title is displaying correctly and if the code is acceptable.

## Why was this MR needed?

When you choose `Last updated` it should display the title `Last updated` instead of `Recently updated`. This fix makes this correctly displays the title.

## What are the relevant issue numbers?
Closes #20308.

## Screenshots (if relevant)
![filter-gitlab-ce](/uploads/52838679d134d57c6ff6120260806fda/filter-gitlab-ce.gif)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5515

Reduce instrumentation overhead

## What does this MR do?

This MR reduces the overhead of instrumented methods. See the commit message of 905f8d76 for more information.

## Are there points in the code the reviewer needs to double check?

Not that I can think of.

## Why was this MR needed?

The overhead of method call instrumentation was too great.

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [x] ~~[Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)~~
- [x] ~~API support added~~
- Tests
  - [x] Added for this feature/bug
  - [ ] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5550

Before when you choose the way of `sort` instead it display the title correctly it was just apply the humanize helper in sort value.

E.g.

When you choose `Last updated` it should display the title `Last updated` instead of `Recently updated`. This fix makes this correctly displays the title.

Change the implementation of the `link_to` `filter_branches_path`

- Change the value of the `params[:sort]` in `link_to`. E.g. instead of using `'recently_updated'` is now using `sort_value_recently_updated`.

- Change the values of the case in the `branches_sorted_by` method for the values it receives in the `params[:sort]` that are: `nil`, `'name'`, `'updated_desc'`, `'updated_asc'`.

This reduces the overhead of the method instrumentation code primarily
by reducing the number of method calls. There are also some other small
optimisations such as not casting timing values to Floats (there's no
particular need for this), using Symbols for method call metric names,
and reducing the number of Hash lookups for instrumented methods.

The exact impact depends on the code being executed. For example, for a
method that's only called once the difference won't be very noticeable.
However, for methods that are called many times the difference can be
more significant.

For example, the loading time of a large commit
(nrclark/dummy_project@81ebdea5df2fb42e59257cb3eaad671a5c53ca36)
was reduced from around 19 seconds to around 15 seconds using these
changes.

Add commit stats

## What does this MR do?
When getting commit by SHA in api it returns commit stats

## Are there points in the code the reviewer needs to double check?
Not sure about test I added do we need separate test or we can just shove stats assertion in test above

## Why was this MR needed?
So api users/clients can get statistics on single commit

## What are the relevant issue numbers?
#20307 

## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5517

Added update guide for 8.11

## What does this MR do?

I need to add notes about Elastic on EE side. To not create ugly conflicts in the future and to not duplicate work I created it here first.

I followed this guide https://gitlab.com/gitlab-org/release-tools/blob/master/doc/release-candidates.md#gitlab-ce

See merge request !5545

* upstream/master: (45 commits)
  Replace reject_blocked with reject_blocked! in callbacks.
  Fix Project#to_param to keep invalid project suitable for use in URLs
  Update CHANGELOG
  Add feature specs for edit project settings
  Fix renaming repository when name contains invalid chars under settings
  Change requests_profiles resource constraint to catch virtually any file
  Allow skipping users in autocomplete
  Fix typo in CHANGELOG
  Update CHANGELOG
  Respective cache is now expired when creating a new branch
  Update CHANGELOG
  Unify HTML format in static error pages
  Make error pages responsive design
  Move color-logic into HipchatService#HipchatService
  Depened on exact version of SimpleCov when patched
  Refactor spam validation to a concern that can be easily reused and improve legibility in `SpamCheckService`
  Refactor `SpamCheckService` to make it cleaner and clearer.
  Submit all issues on public projects to Akismet if enabled.
  Submit new issues created via the WebUI by non project members to Akismet for spam check.
  Upgrade Bullet from 5.0.0 to 5.2.0.
  ...

Replace reject_blocked with reject_blocked! in skipped callbacks.

`reject_blocked!` was introduced in c9def945, I can't find any references to `reject_blocked` ever existing.

See merge request !5532

In Rails 4.2 and below, skipping callbacks (skip_before_action, skip_after_action, etc.) that use methods which do not exist will not throw any errors.

On the other hand, Rails 5 does. See https://github.com/rails/rails/pull/19029

After testing with Rails 5 I noticed there are some methods that don't actually exist (because they were renamed, usually), this fixes a few instances of those.

reject_blocked! was introduced in c9def945, I can't find any references to reject_blocked ever existing.

Submit new issues created via the WebUI or API to Akismet for spam check on public projects.

## What does this MR do?

Submit new issues created via the WebUI by non project members to Akismet for spam check.

## Why was this MR needed?

Support for Akismet was added only to the API with !2266. This MR builds on that functionality to also check issues submitted via the WebUI for spam.

## What are the relevant issue numbers?

Related to:

- #5573 
- #5932 
- gitlab-com/infrastructure#14
- gitlab-com/support#61
- !2266

cc @stanhu @MrChrisW 

See merge request !5333

Update attr_encrypted from 3.0.1 to 3.0.2

This removes methods that were deprecated by Rails 5 so we won't have as many deprecation warnings when we update to Rails 5. Working toward #14286.

Changelog: https://github.com/attr-encrypted/attr_encrypted/blob/master/CHANGELOG.md#302

See merge request !5438

Update rack-oauth2 from 1.2.1 to 1.2.3.

Removes methods deprecated in Rails 5. Working toward #14286.

Changelog: https://github.com/nov/rack-oauth2/compare/v1.2.1...v1.2.3

See merge request !5439

Upgrade Bullet from 5.0.0 to 5.2.0

Removes methods that were deprecated in Rails 5. Working toward #14286.

Changelog: https://github.com/flyerhzm/bullet/blob/master/CHANGELOG.md#520-07262016

See merge request !5443

Upgrade gon from 6.0.1 to 6.1.0.

Removes methods that were deprecated in Rails 5. Working toward #14286.

Changelog: https://github.com/gazay/gon/compare/3a2b56d...9d89bc9

See merge request !5442

Upgrade default_value_for from 3.0.1 to 3.0.2.

Includes support for Rails 5. Working toward #14286.

Changelog: https://github.com/FooBarWidget/default_value_for/compare/release-3.0.1...release-3.0.2

See merge request !5441

Fix renaming repository when name contains invalid chars under settings

Fixes #19538

See merge request !5490

Generate coverage report from whole test suite

Extends our CI plan to merge all coverage results and generate HTML report.

See merge request !5018

Allow skipping users in autocomplete

Ref: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/560

See merge request !5471

Resolve "HipChat notifications missing colors"

_Originally opened at !2322 by @eisnerd._

- - -

## What does this MR do?

This MR restores the colors mentioned in #5571 by overriding the color setting with green/red just for build events.

## What are the relevant issue numbers?

Closes #5571.

See merge request !5498

Make error pages responsive

## What does this MR do?

This MR makes error pages responsive design and all users have better experiences on 404/422/500/502/503/in-deploy error.

## Are there points in the code the reviewer needs to double check?

n/a

## Why was this MR needed?

404/422/500/502/503/in-deploy error pages were designed only for PC and not good for mobile users.

## What are the relevant issue numbers?

Closes #19345

## Screenshots (if relevant)

### PC
![improved-404-lg-v3](/uploads/280f48f95bd446888a81cc2150877cd8/improved-404-lg-v3.png)

### mobile

(with `max-width: 40vw` for `img` (@connorshea) and `max-width: 800px` for `hr` (@annabeldunstone) )
![improved-404-xs-v3](/uploads/9764aac3992dedb6b437045943a07fe5/improved-404-xs-v3.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5000

Pass an array of user IDs in the `skip_users` param to have them
excluded from the results (unless they are explicitly included through
the `current_user` or `author_id` params).

[ci skip]
Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Resolve "Empty project page does not show Repository section on navbar after creating first branch/file"

This MR aims to fix the rendering of the project's page after creating a README/LICENSE/.gitignore and creating the first branch of the project on the website.
Pictures related with the problem this MR fixes linked in #20025

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

Closes #20025

See merge request !5399

Project and branch cache is expired when project is still
empty or new branch is created. develops tests accordingly
Signed-off-by: Rémy Coutable <remy@rymai.me>