This commit rewrites the source documentation to mention both the
systemd units and the init script.

This commit adds native systemd units for the source installation as an
alternative to the current init script.

The units are:
- Service files can be used to seperately start and stop the individual
  GitLab daemons and the target.
- A target unit to logically group the individual services and to start
  and stop GitLab as a whole.
- A slice unit for resource monitoring.

Changelog: added

This adds an optional gem sd_notify, which, when available, allows puma
to notify systemd about having finished its startup. This allows puma to
be Type=notify instead of Type=simple in its service file.

Fix `Security::OverrideUuidsService` matching logic

See merge request gitlab-org/gitlab!72723

Correctly escape regex in GFM autocomplete

See merge request gitlab-org/gitlab!72688

Descrease SIDEBAR_MIN_WIDTH to 260px

See merge request gitlab-org/gitlab!72557

Merge branch '342974-failure-in-ee-browser_ui-fulfillment-purchase-purchase_ci_spec-rb-purchase-ci-minutes-adds' into 'master'

Missing selected group params causes wrong assignment of

See merge request gitlab-org/gitlab!72709

Rails dbconsole requires --database from 14.2, AWS S3 changes from 14.3

See merge request gitlab-org/gitlab!70122

Add tier badges to Database doc pages

See merge request gitlab-org/gitlab!72390

E2E: Set package-and-qa-ff jobs to manual

See merge request gitlab-org/gitlab!72766

Add helper to telephone number field in hand raise modal

See merge request gitlab-org/gitlab!72273

Consolidate labels widget architecture

See merge request gitlab-org/gitlab!72356

Update Vue tracking mixing docs

See merge request gitlab-org/gitlab!72692

Improve error tracking stacktrace method

See merge request gitlab-org/gitlab!72700

Allow custom support email without configuring custom project suffix

See merge request gitlab-org/gitlab!71940

Removes `cached_issues_state_count` feature flag

See merge request gitlab-org/gitlab!72516

Review feedback

Fix tests

Review feedback

Review feedback

- Update labels within widget

Labels widget - Fix search input

See merge request gitlab-org/gitlab!72659

Source & Content for hand raise & trial leads

See merge request gitlab-org/gitlab!72639

Set Content-Length header on Dependency Proxy injection

See merge request gitlab-org/gitlab!72670

Improve feature tests

See merge request gitlab-org/gitlab!72326

Ensure commits limit is always positive

See merge request gitlab-org/gitlab!72274

E2E: Check for failure presence for bulk imports

See merge request gitlab-org/gitlab!72673

Global Search - Update Apply Button

See merge request gitlab-org/gitlab!72531

Update BitBucket Server importer username mapping

See merge request gitlab-org/gitlab!66653