This replicates Sidekiq behavior
of pushing dead job into DeadSet.

Transform `CancelledError` into `JobRetry::Skip`

- Retry connection when it fails
- Properly shutdown daemon
- Stop monitor if the Exception is raised
- Properly guard exception handling

If we process message that is not designated to us
previously we would fire a separate Thread for that.
We don't need to do it. We can cheaply check if thread
is available, if it is, we can perform expensive operation
then.

This makes:
- very shallow `Middleware::Monitor` to only request tracking
  of sidekiq jobs,
- `SidekiqStatus::Monitor` to be responsible to maintain persistent
  connection to receive messages,
- `SidekiqStatus::Monitor` to always use structured logging
  and instance variables

This adds a middleware to track all threads
for running jobs.

This makes sidekiq to watch for redis-delivered notifications.

This makes be able to send notification to interrupt
running sidekiq jobs.

This does not take into account any native code,
as `Thread.raise` generates exception once the control gets
back to Ruby.

The separate measure should be taken to interrupt gRPC, shellouts,
or anything else that escapes Ruby.

Fix to show renamed file in mr

Closes #59786

See merge request gitlab-org/gitlab-ce!31888

Throw error for multiple RecaptchaModal instances

See merge request gitlab-org/gitlab-ce!32017

Merge branch 'ce-port-12918-metrics-dashboard-alerting-menu-unavailable-when-additional-panel-types-is-enabled-2' into 'master'

CE Port: Use EE panel type to display alert menu correctly in dashboards

See merge request gitlab-org/gitlab-ce!31873

Make native event test in autosave_spec.js synchronous

See merge request gitlab-org/gitlab-ce!32003

Remove wiki page slug dialog step when creating wiki page

See merge request gitlab-org/gitlab-ce!31362

Resolve "Improve system notes for Zoom links"

Closes #65427

See merge request gitlab-org/gitlab-ce!31410

Added an example to doumentation for using multiple build policies with only: and except:

See merge request gitlab-org/gitlab-ce!31983

Update capitalization in k8s cheat sheet

Closes #65816

See merge request gitlab-org/gitlab-ce!32036

Improve details about when rebase button is offered

See merge request gitlab-org/gitlab-ce!29644

Remove Gitaly version in the docs

See merge request gitlab-org/gitlab-ce!32006

Update grammar in DAG docs

See merge request gitlab-org/gitlab-ce!32021

Fix code blocks in frontend testing guide (docs)

See merge request gitlab-org/gitlab-ce!32002

Fix outdated references to soft deletion

See merge request gitlab-org/gitlab-ce!31982

Previously we asked a user to enter a new slug before taking them to
the Create Page page.

As a UX improvement, we now take them to a randomly generated URI so
they can begin creating their new page.

https://gitlab.com/gitlab-org/gitlab-ce/issues/46299

Remove margin from user header buttons

Closes #57966

See merge request gitlab-org/gitlab-ce!30878

Match syntax highlighting theme for line expansion rows

Closes #66066

See merge request gitlab-org/gitlab-ce!31821

- dark
- white
- monokai
- none
- solarized-dark
- solarized-light

Flexible Rules for CI Build config

See merge request gitlab-org/gitlab-ce!29011

- Added Gitlab::Ci::Config::Entry::Rules and Gitlab::Ci::Config::Entry::Rules:Rule
  to handle lists of Rule objects to be evalauted for job inclusion
- Added `if:` and `changes:` as available Rules::Rule::Clause classes
- Added Rules handling logic to Seed::Build#included? with extra specs
- Use DisallowedKeysValidator to mutually exclude rules: from only:/except: on job config

Use gitlab-shell v9.4.1

See merge request gitlab-org/gitlab-ce!32022

Upgrade babel to 7.5.5

See merge request gitlab-org/gitlab-ce!31819

In ssh_keys docs, don't redirect stdout of ssh-add

See merge request gitlab-org/gitlab-ce!31630

Update repository languages screenshot

See merge request gitlab-org/gitlab-ce!31925

Fix assertion in mocks_helper_spec.js

See merge request gitlab-org/gitlab-ce!32005