Improve docs for cross-project MR dependencies

Closes gitlab-ee#12980

See merge request gitlab-org/gitlab-ce!31904

Addressing a documentation review by Marcia!

Docs: Refresh CI quick start screenshots

See merge request gitlab-org/gitlab-ce!31877

Remove MySQL references from development docs

See merge request gitlab-org/gitlab-ce!31712

Mentions `auth.log` on Rate limit docs

See merge request gitlab-org/gitlab-ce!31906

Requests over the rate limit are logged into `auth.log`

Update srmX configuration description

See merge request gitlab-org/gitlab-ce!31142

add GitLab CI job token API authentication section

See merge request gitlab-org/gitlab-ce!30698

Regenerate locale/gitlab.pot

See merge request gitlab-org/gitlab-ee!15344

Merge branch '50020-fe-allow-email-notifications-to-be-disabled-for-all-users-of-a-group' into 'master'

UI for disabling group/project email notifications

Closes #50020

See merge request gitlab-org/gitlab-ce!30961

- Adds UI to configure in group and project settings
- Removes notification configuration for users when
disabled at group or project level

Migrate legacy uploads rake tasks

See merge request gitlab-org/gitlab-ce!29409

Add new table to store email domain per group

See merge request gitlab-org/gitlab-ce!31071

In order to save user preferences regarding
user emails allowed to be invited to group

Add foreign_key and down method

Change adding foreign key

Add partial call to view

Add changelog entry

Fix schema

Allow restricting group members by a domain whitelist

Closes #10972

See merge request gitlab-org/gitlab-ee!14800

From squash:
> Add new table to store email domain
>
> In order to save user preferences regarding users allowed to be invited to group

Add a Upgrade button to group's billings page

Closes customers-gitlab-com#517

See merge request gitlab-org/gitlab-ee!14849

It adds an upgrade button to the group billings
page that redirects to the customers portal
upgrade checkout page.

If the user is not logged in at the portal he/she
will be automatically redirected after the login
process.

If the user is at the latest tier, the button
won't be presented.

Embed specific metrics chart in issue

Closes #62971

See merge request gitlab-org/gitlab-ce!31644

This MR adds the styles for displaying a single
chart next to another one when embedding them
in an issue.

Fix starrers counts after searching

See merge request gitlab-org/gitlab-ce!31823

Resolve "Broken master: Job Failed #274177103"

Closes #13587

See merge request gitlab-org/gitlab-ee!15302

Look up upstream commits once before queuing ProcessCommitWorkers

Closes #65464

See merge request gitlab-org/gitlab-ce!31871

Optimize DB indexes for ES indexing of notes

See merge request gitlab-org/gitlab-ce!31846

Expire project caches once per push instead of once per ref

Closes #52046

See merge request gitlab-org/gitlab-ce!31876

Previously `ProjectCacheWorker` would be scheduled once per ref, which
would generate unnecessary I/O and load on Sidekiq, especially if many
tags or branches were pushed at once. `ProjectCacheWorker` would expire
three items:

1. Repository size: This only needs to be updated once per push.
2. Commit count: This only needs to be updated if the default branch
   is updated.
3. Project method caches: This only needs to be updated if the default
   branch changes, but only if certain files change (e.g. README,
   CHANGELOG, etc.).

Because the third item requires looking at the actual changes in the
commit deltas, we schedule one `ProjectCacheWorker` to handle the first
two cases, and schedule a separate `ProjectCacheWorker` for the third
case if it is needed. As a result, this brings down the number of
`ProjectCacheWorker` jobs from N to 2.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/52046