Preloads head pipeline for each merge request

Closes #27168

See merge request !10064

Resolve "Follow-up from "Backport of Multiple Assignees feature""

See merge request !11185

Remove Gitlab::Git#archive_to_file

See merge request !11205

Limit User's trackable attributes to update at most once/hour

Closes #22068

See merge request !11053

Increase verbosity of triggered build

Closes omnibus-gitlab#2318

See merge request !11188

Prevent vue.esm.js from being bundled into the primary JS bundle

Closes #31966

See merge request !11177

Robustify environment policy specs to pass on EE

See merge request !11203

Fix spec/features/snippets/notes_on_personal_snippets_spec.rb

Closes #31993

See merge request !11199

Fix skipped manual actions issue in pipeline processing

Closes #30212

See merge request !11164

In commit 020295ff a regex was added to quickly determine if mentionables might
be referenced. But this didn't take into account the note might not belong to a
project. So when it doesn't belong to a project, assume the default issue
tracker is used, and use DEFAULT_PATTERN to check if there are mentionables.

Fixes gitlab-org/gitlab-ce#31993

Fixed UP arrow key not editing last comment in discussion

Closes #31348

See merge request !11173

Fix notify_only_default_branch check for Slack service

See merge request !11154

Merge request widget redesign

Closes #25424 and #27950

See merge request !10319

Update guides for 9.2

See merge request !11157

Merge branch '28794-standardize-jasmine-test-describe-block-names-that-test-specific-methods' into 'master'

Resolve "Standardize jasmine test describe block names that test specific methods"

Closes #28794

See merge request !11137

Closes #31348

Use regex to skip unnecessary reference processing in ProcessCommitWorker

Closes #28359

See merge request !10867

Fix notes_on_personal_snippets_spec

Closes #31938

See merge request !11160

Add index_redirect_routes_path_for_link migration to setup_postgresql

See merge request !11165

Use absolute URLs for fixtures

See merge request !11133

Fix sub-second timing comparison error for Devise confirmation period

Closes gitlab-ee#2362

See merge request !11156

Update gitignore, dockerfile, and license templates for 9.2

See merge request !11158