Fix label creation from issuable for subgroup projects

Closes #30667

See merge request !11011

Load milestone tabs asynchronously

See merge request !10919

Merge branch '29673-500-internal-server-error-when-enabling-a-deploy-key-more-than-once-through-api' into 'master'

Detect already enabled DeployKeys in EnableDeployKeyService

Closes #29673

See merge request !11010

Commit view correctly spans the full width when parallel view

Closes #30881

See merge request !10851

Note Ghost user and refer to user deletion documentation

Closes #31383

See merge request !11012

Extract common parts of snippet and blob pages into partial

See merge request !11049

Make MR link in build sidebar bold

See merge request !10513

Resolve "Misaligned buttons in Wiki pages"

Closes #31704

See merge request !11043

find and match first dropdown before clicking

See merge request !11060

Added emoji description title to award emoji buttons

Closes #29971

See merge request !10881

Added find before clicking the access_type_name within the dropdown

See merge request !11051

Added find for collapsed sidebar before asserting

See merge request !11052

Include missing project attributes to Import/Export

Closes gitlab-ee#2251 and #26333

See merge request !10880

+ Add a partial for displaying user deletion guidance

Remove N+1 queries when checking nodes visible to user

See merge request !11040

Ensures deploy keys can't be re-added, which causes a validation error

Wait for AJAX requests at the JS level in addition to wait for requests at the middleware level

Closes #29836

See merge request !10688

Document pipeline grouping

Closes #28317 and #29176

See merge request !10969

Document wikis

Closes #7028

See merge request !11041

Resolve "Unnecessary padding along left side of assignees dropdown"

Closes #31057

See merge request !10767

Re-enable ref operations with gitaly after not-found fix

See merge request !10773

Enable `RSpec/DescribedClass` cop and correct violations

See merge request !10930

Also implemented same behavior on the Issue Boards assignee block.
Fixed the default state for search/filter dropdown for issuables.

Remove unused initializer

See merge request !11036

Reject more reserved paths

Closes #30272

See merge request !10413