Add latest changes from gitlab-org/gitlab@master

changelogs/unreleased/22986-share_group_with_group_ff_default_on.yml

----
-title: Allow to share groups with other groups
-merge_request: 23185
-author:
-type: changed

changelogs/unreleased/24190-archived-project-warning-message-on-discussion-thread.yml

----
-title: Display login or register widget only if user is not logged in
-merge_request: 22211
-author:
-type: fixed

changelogs/unreleased/24305-create-new-project-auto-populate-project-slug-string-to-project-nam.yml

----
-title: 'Resolve Create new project: Auto-populate project slug string to project name
-  if name is empty'
-merge_request: 22627
-author:
-type: changed

changelogs/unreleased/24605-allow-admins-to-disable-users-ability-to-change-profile-name.yml

----
-title: Allow admins to disable users ability to change profile name
-merge_request: 21987
-author:
-type: added

changelogs/unreleased/25250-can-t-use-quick-action-to-set-milestone-when-the-project-only-has-m.yml

----
-title: Fix milestone quick action to handle ancestor group milestones
-merge_request: 22231
-author:
-type: fixed

changelogs/unreleased/25343-show-readme-txt.yml

----
-title: Fix README.txt not showing up on a project page
-merge_request: 21763
-author: Alexander Oleynikov
-type: fixed

changelogs/unreleased/26543-add-word-diff-highlight-to-rich-text.yml

----
-title: Apply word-diff highlighting to Suggestions
-merge_request: 22182
-author:
-type: changed

changelogs/unreleased/27244-discard-fix.yml

----
-title: Fix "Discard" for newly-created and renamed files
-merge_request: 21905
-author:
-type: fixed

changelogs/unreleased/27296-incorrect-task-list-checked-with-embedded-subtasks.yml

----
-title: Properly check a task embedded in a list with no text
-merge_request: 21947
-author:
-type: fixed

changelogs/unreleased/27366-supergroup-milestone-not-showing-in-subgroup-board-issue-list.yml

----
-title: Fix group issue list and group issue board filters not showing ancestor group
-  milestones
-merge_request: 23038
-author:
-type: fixed

changelogs/unreleased/27427-boards-sidebar-icon.yml

----
-title: Increase size of issue boards sidebar collapse button
-merge_request:
-author:
-type: fixed

changelogs/unreleased/27518-revoke-active-sessions.yml

----
-title: Restores user's ability to revoke sessions from the active sessions
-  page.
-merge_request: 17462
-author: Jesse Hall @jessehall3
-type: changed

changelogs/unreleased/27884-fix-table-styles.yml

----
-title: Fix markdown table border colors
-merge_request: 22314
-author:
-type: fixed

changelogs/unreleased/27946-merge-request-discussions-api-doesn-t-reject-an-error-input-in-some.yml

----
-title: Resolve "Merge request discussions API doesn't reject an error input in some
-  case"
-merge_request: 21936
-author:
-type: fixed

changelogs/unreleased/29403-migrate-issue-tracker-data.yml

----
-title: Migrate issue trackers data
-merge_request: 18639
-author:
-type: other

changelogs/unreleased/29772-completely-removing-use_legacy_pipeline_triggers.yml

----
-title: Remove feature flag 'use_legacy_pipeline_triggers' and remove legacy tokens
-merge_request: 21732
-author:
-type: removed

changelogs/unreleased/30229-background-migration-pruneorphanedgeoevents-did-you-mean-pruneoldev.yml

----
-title: 'Fix: undefined background migration classes for EE-CE downgrades'
-merge_request: 22160
-author:
-type: fixed

changelogs/unreleased/30395-pages-ssl-limitations-warning.yml

----
-title: Display SSL limitations warning for project's pages under namespace that contains
-  dot
-merge_request: 21874
-author:
-type: other

changelogs/unreleased/30936-ado-quick-start.yml

----
-title: Adds quickstart doc link to ADO CICD settings
-merge_request:
-author:
-type: changed

changelogs/unreleased/30968-make-open-user-registration-setting-more-prominent-to-admins.yml

----
-title: Add documentation & helper text information regarding securing a GitLab instance
-merge_request: 18987
-author:
-type: changed