Process scheduled background migrations as well

Closes #34951

See merge request !12787

Expire cached user IDs that can see the performance after 5 minutes

See merge request !12911

Simply re-raise an exception when it occurs, but guarantee that no
background migration is lost in the process.

Added cop to blacklist the use of hash indexes

See merge request !12869

If we don't expire the cached user IDs, the list of IDs would become
outdated when a new member is added, or when a member ios removed from
the allowed group.
Signed-off-by: Rémy Coutable <remy@rymai.me>

Remove Repository#search_files

See merge request !12879

Fix label creation from new list for subgroup projects

Closes #35181

See merge request !12906

Branch and tag refactors for Gitaly

See merge request !12872

Bump fog-core to 1.44.3 and fog providers' plugins to latest

Closes #35155

See merge request !12897

Introduce have_gitlab_http_status

Closes #34964

See merge request !12883

It also makes it possible to gracefully retry a migration in order to
avoid problems like deadlocks.

Reduce padding on context header

Closes #35064

See merge request !12855

Add white background to context header avatar

See merge request !12857

Fix incorrect AWS ELB metrics.

Closes #35174

See merge request !12902

Update Google launcher details

[ci skip]

See merge request !12899

Fix wrong link to docs in docs styleguide

See merge request !12901

Update health check docs

See merge request !12794

Update issue-related docs

See merge request !12881

Refactor groups docs

See merge request !12888

Add subgroups limitations to Pages docs

Closes #34621

See merge request !12891

Update MR-related docs

See merge request !12875

Add AD matching rule filter and more information

See merge request !12871

Merge branch '35069-stop-using-rgba-for-text-color-as-it-leads-to-worse-readability-on-non-retina-screens' into 'master'

Resolve "Stop using RGBA for text color as it leads to worse readability on non-retina screens"

Closes #35069

See merge request !12873

Fix javascript test coverage badge in README.md

See merge request !12878

Update metric names to match Prometheus guidelines.

Closes #35031

See merge request !12812

So that whenever this failed:

    expect(response).to have_gitlab_http_status(200)

We see what's the response there. Here's an example:

```
1) API::Settings Settings PUT /application/settings custom repository storage type set in the config updates application settings
   Failure/Error: expect(response).to have_gitlab_http_status(200)
     expected the response to have status code 200 but it was 400. The response was: {"error":"password_authentication_enabled, signin_enabled are mutually exclusive"}
```

Fixes the user order being overriden in the autocomplete controller

See merge request !12868

Changes in msgid in synchronization gitlab.pot

See merge request !12861

Pass before_script and script as-is preserving arrays

See merge request !12680