* 9-1-stable:
  Merge branch 'revert-a0d734c9' into 'master'

Revert "Merge branch 'grpc-1.2.2' into 'master'"

See merge request !10700

Fix registry for projects with uppercases in path

Closes #30880

See merge request !10674

After Trace#limit, we seek to the next line in case

Closes #30796

See merge request !10681

* 9-1-stable:
  Merge branch 'docs-add-auth-to-topics-page' into 'master'
  Merge branch 'docs-topic-auth' into 'master'
  Merge branch '27755-update-pipelines-documentation' into 'master'
  Merge branch 'rs-fix-already-defined-constant' into 'master'
  Merge branch 'change-merged-icon' into 'master'
  Merge branch 'grpc-1.2.2' into 'master'
  Merge branch 'fix-missing-capitalisation-buttons' into 'master'
  Merge branch 'improve-discussions-feature-attempt-1' into 'master'
  Merge branch 'siemens/gitlab-ce-fix/subgroup-hide-button' into 'master'
  Merge branch 'backport-ee-1525' into 'master'
  Merge branch 'use-avatars-in-activity-view' into 'master'
  Merge branch '30457-expire-note-destroy' into 'master'
  Merge branch 'patch-15' into 'master'
  Merge branch '30642-fix-recent-search-history-icon-alignment-in-safari' into 'master'
  Merge branch 'zj-api-fix-build-events' into 'master'
  Merge branch 'zj-fix-coverage-bug' into 'master'
  Merge branch '30858-system-notes-indent' into 'master'
  Merge branch 'fix-preloading-merge_request_diff' into 'master'
  Update VERSION to 9.1.0-rc1

Resolve "Disable the experimental GitLab elasticsearch indexer checkbox if it's not in $PATH"

Closes #2149

See merge request !1643

Add icon for approvals in MR

See merge request !1641

Resolve "Making it easier to configure approvals in project settings"

Closes #1738

See merge request !1527

Port of use-avatars-in-activity-view to EE

See merge request !1632

Fix Service Desk emails

See merge request !1638

Port of change-merged-icon to EE

See merge request !1640

Fix push rules on Git 2.11

Closes #1736

See merge request !1525

Add auth to topics page

See merge request !10643

Documentation topic: Authentication

Closes #30744

See merge request !10608

Resolve "Update Pipelines documentation"

Closes #27755

See merge request !10600

Fix NUMBER_OF_TRUNCATED_DIFF_LINES re-definition error

See merge request !10664

Update merged icon

See merge request !10635

Use gRPC 1.2.2

Closes #30766

See merge request !10589

Fixed missing capitalisation on buttons

See merge request !10631

Improve discussion_comments_spec perf

See merge request !10648

Hide new subgroup button if user has no permission to create one

Closes #30139

See merge request !10627

Backport Git-env code from EE "Fix push rules on Git 2.11" (gitlab-org/gitlab-ee!1525)

See merge request !10547

Use avatars instead of icons in activity view

See merge request !10596

Fix issue's note cache expiration after delete

Closes #30457

See merge request !10461

Add link to environments on kubernetes.md

See merge request !10555

Fix recent searches icon alignment in Safari

Closes #30642

See merge request !10606

Api fix build events rename to Job events

Closes #30412

See merge request !10586

Return nil as coverage instead of a File object

See merge request !10633

Indent system notes on desktop screens

Closes #30858

See merge request !10667

Use preload to avoid Rails using JOIN

See merge request !10666

* 9-1-stable: (23 commits)
  Fix token test by specifying a static token
  Merge branch 'new-git-index' into 'master'
  Merge branch 'dz-fix-group-move' into 'master'
  Merge branch 'dewet-do-disclaimer' into 'master'
  Merge branch 'dz-fix-project-view' into 'master'
  Merge branch 'rs-fix-doc-anchor-link' into 'master'
  Merge branch '1595-ee-backport-environments-tests' into 'master'
  Merge branch 'ci-favicon-back-in' into 'master'
  Merge branch 'test-all-etag-routes' into 'master'
  Merge branch 'alkuzad/gitlab-ce-namespaces_encoding_docs' into 'master'
  Merge branch 'zj-fk-ci-triggers' into 'master'
  Merge branch 'file-view-container' into 'master'
  Merge branch 'dm-remove-copy-link-on-svgs' into 'master'
  Merge branch 'fix/gb/improve-container-registry-clipboard-links' into 'master'
  Merge branch '25274-gitlab_flow-md-broken-download-link-in-resources' into 'master'
  Merge branch 'document-polling-interval' into 'master'
  Merge branch '30636-fix-blame-edit-blob-without-repo-permissions' into 'master'
  Merge branch 'mr-widget-bug-fix' into 'master'
  Merge branch 'removed-notebooklab-absolute-paths' into 'master'
  Fix failure: spec/controllers/projects/builds_controller_spec.rb:33
  ...

New git index

See merge request !10349

Fix subgroup repository disappearance if group was moved

Closes #30261

See merge request !10414

Disclaimer for testing guide not be be used in prod

See merge request !10468