* upstream/master: (638 commits)
  Simplify background migrations stealing code
  Expire cached user IDs that can see the performance after 5 minutes
  Promote visibility level helpers from Group to Namespace
  Fix off-by-one error in background migration retries
  Recover from all exceptions when stealing bg migration
  Fix label creation from new list for subgroup projects
  move click handler to button. when on the icon it wasn't triggered in firefox
  Fix incorrect AWS ELB metrics.
  Fix wrong link to docs in docs styleguide
  Update issue-related docs
  Refactor groups docs
  Add subgroups limitations to Pages docs
  Update Google launcher details
  Split docs on IP whitelist for monitoring access
  Update health check docs
  Bump fog-core to 1.44.3 and fog providers' plugins to latest
  Introduce have_gitlab_http_status
  Remove Repository#search_files
  Update Pipeline's badge count in Merge Request and Commits view to match real-time content
  Fixes the user order being overriden in the autocomplete controller
  ...

Promote visibility level helpers from Group to Namespace

Closes gitlab-ee#2950

See merge request !12910

move click handler to button. when on the icon it wasn't triggered in firefox

Closes #35164

See merge request !12905

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outdated when a new member is added, or when a member ios removed from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

In EE, we make use of `namespace#public?` in projects. When the project is in a
personal namespace, this breaks as the `public?` helper isn't present.

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