Add instant comments support

Closes #27614

See merge request !10760

Resolve: "Pipelines: When we retry a pipeline 2 requests are made to the pipelines endpoint"

Closes #30237

See merge request !10584

Fixed bug where merge request JSON would show

Closes #28909

See merge request !11096

Display slash commands outcome when previewing Markdown

Closes #21531

See merge request !10054

Resolve "Documentation: Frontend list of do's and don'ts"

Closes #31552

See merge request !11091

Add a manual job to trigger package build in omnibus

Closes omnibus-gitlab#2234

See merge request !11086

Update design of auth error page

Closes #29145

See merge request !11099

Remove # char for commit

Closes #31810

See merge request !11093

This makes it possible to workaround a bug in `safe_constantize` which
caused a `LoadError` exception when doing

```
"Pipeline".safe_constantize
LoadError: Unable to autoload constant Pipeline, expected
/home/grzesiek/gdk/gitlab/app/models/ci/pipeline.rb to define it
```

See https://github.com/rails/rails/issues/28854 for more details.

Internationalise Cycle Analytics page

Closes #28433

See merge request !10669

Conflicts:
	lib/gitlab/cycle_analytics/review_stage.rb
	lib/gitlab/cycle_analytics/staging_stage.rb
	lib/gitlab/cycle_analytics/test_stage.rb

Fix wording of Cycle Analytics stage legends

See merge request !11106

Port of "2274-store-last-repository-updated-at" to CE

See merge request !11085

Resolve "Web GUI: Unable to create new branch from commit SHA"

Closes #30329

See merge request !10738

Fix MR target branch select dropdown placement cut-off

Closes #31271

See merge request !10902

Deploy keys load async

Closes #29667

See merge request !10973

Reject EE reserved namespace paths in CE as well

Closes #31800

See merge request !11095

Include the bundler:audit job into the static-analysis job

Closes #31824

See merge request !11092

Add enableMap to gl.GfmAutoComplete for partial re-use --  EE backport

See merge request !11073

Closes #28909