Add the gitlab-experiment gem, with configuration

See merge request gitlab-org/gitlab!45840

- To be used by the experiment library configuration and to identify
differences between feature flag types.
- Fixes minor incorrectness in usage examples.

Add deprecation message about one click GMA

See merge request gitlab-org/gitlab!49557

Fixing the bare minimum of issues that are causing a red pipeline.

Move custom_compliance_frameworks to GL Premium

See merge request gitlab-org/gitlab!49598

Migrate HAML buttons to Pajamas in app/views/profiles/keys

See merge request gitlab-org/gitlab!49421

Add the Features by Group handbook URL into Feature issue templates

See merge request gitlab-org/gitlab!49483

Drop matching_merge_request_db_sync feature flag

See merge request gitlab-org/gitlab!49644

Jdb/fix jupyter notebooks rendering

See merge request gitlab-org/gitlab!49067

Merge branch '292041-geo-personal-snippets-with-private-or-internal-visibility-level-are-not-replicated' into 'master'

Fix: Geo should be able to replicate Personal snippets

See merge request gitlab-org/gitlab!49583

Fix manual job trace polling

See merge request gitlab-org/gitlab!49752

Increase epic max child hierarchy to seven

See merge request gitlab-org/gitlab!49619

Add stage / group metadata to Editor Lite page

See merge request gitlab-org/gitlab!49755

Manual job is polling when
it is not started. Also fetchTrace
on manual trigger action to show trace
soon.

Fix Gitlab possessives in Configure docs

See merge request gitlab-org/gitlab!49654

The documentation for Configure contained some instances of GitLab
with the possessive form, which we shouldn't use for legal reasons.

Incident Management docs: Correct name of feature and remove old image

See merge request gitlab-org/gitlab!49747

Fix `Close epic` button not working on epic page

See merge request gitlab-org/gitlab!49597

Fix regression caused by
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/48273

Fixes recomendation about RC limit in developer docs

See merge request gitlab-org/gitlab!49621

Per the developer, this page belongs to the Create stage and the
Editor group. This commit adds metadata to the page so it's
accounted for.

Fix generated GraphQL docs

See merge request gitlab-org/gitlab!49748

Clarify supported object storage for Terraform

See merge request gitlab-org/gitlab!49683

Merge branch '237891-improve-ci-for-external-repo-with-configurable-maximum-mirroring-frequency-on-self-hosted' into 'master'

Improve CI for external repo with configurable maximum mirroring frequency on self-hosted

See merge request gitlab-org/gitlab!48955

Add a new column pull_mirror_interval_seconds
which allows an adming to set the pull mirror interval
in seconds per instance.

Auto approve users if Admin approval after sign up setting is disabled

See merge request gitlab-org/gitlab!49068

This worker will auto-approve blocked users when the setting
require_admin_approval_after_user_signup gets disabled. This setting is
enabled by default in new instances.

Add note about Dependency Proxy variables being added in 13.7

See merge request gitlab-org/gitlab!49652

Remove future tense from Code Review page

See merge request gitlab-org/gitlab!49671

A word with a British spelling variant we should be keeping an eye
out for in our documentation. Added several variations on the word.

Update and remove CSS, and remove unused issue header code

See merge request gitlab-org/gitlab!48239

The issue header was converted from Haml to Vue and as part
of removing the associated `vue_issue_header` feature flag,
lots of unused code was removed. This is the last commit to
remove unused issue header code, and includes some CSS
refactorings to remove even more CSS.

https://gitlab.com/gitlab-org/gitlab/-/issues/276444

Fix Rails/SaveBang violations in migration specs [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!49564

Remove legacy_data? method on legacy burndown

See merge request gitlab-org/gitlab!49662

Merge branch '271250-fe-devops-report-adding-preparing-state-and-tooltips-in-segment-table-4' into 'master'

DevOps Report: Add segments button tooltip

See merge request gitlab-org/gitlab!49691

We introduce the limit of 30 segments in this MR
and display a tooltip on the disabled button when
this happens.