Revert "Combine 'turn on/off' user dropdown links into 'experimental features' link and andded 'experimental features' heading for user preferences page"

This reverts commit 75f490a4.

Unset the `RUBYOPT` env variable before installing `gitaly-ruby`

Closes #35941 and #35967

See merge request !13313

Add Italian translations of Pipeline Schedules

Closes #35002

See merge request !12981

Fix the iids parameters in the API documentation

See merge request !13340

Add Multi-File Editor Using Monaco/VSCode

Closes #31890

See merge request !12198

* master: (86 commits)
  Show all labels
  33874 confidential issue redesign
  Exclude merge_jid on Import/Export attribute configuration
  Resolve "User dropdown in filtered search does not load avatar on `master`"
  Re-add column locked_at on migration rollback
  Group-level new issue & MR using previously selected project
  [EE Backport] Update log audit event in omniauth_callbacks_controller.rb
  more eagerly bail when the state is prevented
  Move locked_at removal to post-deployment migration
  Add class to other sidebars
  Improve mobile sidebar
  reduce iterations by keeping a count of remaining enablers
  Store & use ConvDev percentages returned by Version app
  Store MergeWorker JID on merge request, and clean up stuck merges
  Backport changes in https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2551 to CE
  DRY up caching in AbstractReferenceFilter
  Update CHANGELOG
  Add CHANGELOG entry
  Fix html structure Removes test for removed behavior
  Port form back to use form_tag
  ...

Show all labels

See merge request !13303

Resolve "Store MergeWorker JID on merge request, and clean up stuck merges"

Closes #31207

See merge request !13207

33874 confidential issue redesign

See merge request !12801

Resolve "User dropdown in filtered search does not load avatar on `master`"

Closes #35729

See merge request !13181

Migrate Repository#find_commits_by_message to Gitaly

Closes gitaly#443

See merge request !13268

Migrate Gitlab::Git::Repository#size to Gitaly

Closes gitaly#437

See merge request !13259

Issuables: Move some code from create services to Sidekiq workers

See merge request !13326

DeclarativePolicy: reduce iterations of the step set

See merge request !13352

Add two more metrics for CI/CD

See merge request !13039

Remove JS flicker on page load; UI tweaks

See merge request !13347

Group-level new issue & MR using previously selected project

Closes #34411

See merge request !13058

Since the parameter name is really `iids[]`, it should be used consistently
across the documentation.

Store & use ConvDev percentages returned by Version app

Closes #35761

See merge request !13217

* master: (177 commits)
  Add changelog
  Bump gitlab-shell version to 5.8.0 to fix Git for Windows 2.14
  Make contextual sidebar collapsible
  Fixed sidebar context header hover colors
  Use correct `Environment`-class within `Gitlab` namespace
  Remove gl.Activities from Commits page
  Move `let` calls inside the `describe` block using them
  Add `/assign me` alias support for assigning issuables to oneself
  GRPC::Unavailable (< GRPC::BadStatus) is wrapped in a CommandError
  Use `broken_storage` in the fs_shards_spec.
  Eager load project creators for project dashboards
  Memoize a user's personal projects count
  Remove redundant query from User#recent_push
  Improve checking if projects would be returned
  Change spelling of gitlab-shell
  Remove unused #tree-holder
  Add custom linter for inline JavaScript to haml_lint
  Rename user_can_admin? because it's more accurate
  Synchronous zanata community contribution translation
  Add Korean translation to i18n
  ...

[EE Backport] Update log audit event in omniauth_callbacks_controller.rb

See merge request !13339