Allow ReactiveCaching to support nil value

See merge request gitlab-org/gitlab-ce!30456

Push feature flag for embedding metrics

See merge request gitlab-org/gitlab-ce!30342

Limit user information to RackAttack throttles

See merge request gitlab-org/gitlab-ce!30467

rack.attack.match_discriminator is only return on
throttle_authenticated_api or throttle_authenticated_web requests, so
we're avoiding logging user_id on blacklist requests

Follow up of https://gitlab.com/gitlab-org/gitlab-ce/issues/62756

Docs: Remove extra whitespaces in docs

See merge request gitlab-org/gitlab-ce!30493

Removes all the extra whitespaces at end of lines,
inside tags, and removes extra newlines

Centralize markdownlint configuration

See merge request gitlab-org/gitlab-ce!30263

The configuration is currently only specified in CI, by moving it into
`.mdlrc` we get immediate feedback locally in supported editors.

To ensure `mdl` is available it's also added to the `Gemfile`, though
CI will still use the version installed in the `gitlab-docs-lint` image.

Update the installation link

See merge request gitlab-org/gitlab-ce!30489

Docs: Update redirected links in docs (part 2)

See merge request gitlab-org/gitlab-ce!30441

Updating redirected links in the development, install, policy
raketasks and university dirs. Should now link to final
URL to avoid redirect hops

Move the consul server docs to its own section

Closes #63538

See merge request gitlab-org/gitlab-ce!30192

The consul docs are currently in the HA database section, but it should
be in it's own section.

Add relevant webcast to drive traffic and MQLs

See merge request gitlab-org/gitlab-ce!30236

Doc for "Require session with smartcard login for Git access"

See merge request gitlab-org/gitlab-ce!30466

Docs: Update redirected links in docs (part 3)

See merge request gitlab-org/gitlab-ce!30442

This updates redirected links in integration, update, user
and workflow dirs. Should now link to final URLs to avoid
redirect hops

The installation link has changed from /installation/ to /install/. This
commit will update all the remaining links that are missing.

Disable parts of the QA AutoDevOps Pipeline

See merge request gitlab-org/gitlab-ce!30427

Jobs Disabled: Code-Quality, DAST, Container-Scanning,
Dependency-Scanning, License-Management, SAST

Jobs still enabled: Build, Test, Deploy, Browser-Performance-Testing

Bump prometheus-client-mmap to 0.9.8

See merge request gitlab-org/gitlab-ce!30479

This fixes a critical error where a nil exception would be hit
if an error occurred while logging a Prometheus metric:

https://gitlab.com/gitlab-org/prometheus-client-mmap/merge_requests/36

Resolve "i18n Broken - Boards blank state"

Closes #64260

See merge request gitlab-org/gitlab-ce!30464

Update group statistics when some columns on ProjectStatistics are updated

See merge request gitlab-org/gitlab-ce!30329

Schedules a Namespace::AggregationSchedule worker if some of the project
statistics are refreshed.

The worker is only executed if the feature flag is enabled.

When :calculate_reactive_caching returns a nil value
this caused ReactiveCaching to schedule a worker
every time the code using :with_reactive_cache was called.

This issue caused an increasing amount of Sidekiq jobs
being created continuously.

Implementing this fix behind feature flag
:reactive_caching_check_key_exists

Resolve "Follow-up from "Visual Review Toolbar Docs""

Closes #63362

See merge request gitlab-org/gitlab-ce!30040

Reorganize and better explain what Visual Reviews are

CE Port: Fix race condition of `refs/merge` competing overwrite

See merge request gitlab-org/gitlab-ce!30308

Use Rugged if we detect storage is NFS and we can access the disk

See merge request gitlab-org/gitlab-ce!29725

Reduce N+1 queries in MergeRequestsController#ci_environment_status

See merge request gitlab-org/gitlab-ce!30224

Upgrade prometheus-client-mmap to 0.9.7

See merge request gitlab-org/gitlab-ce!30430

Remove a high cardinality Prometheus metric

See merge request gitlab-org/gitlab-ce!30122

Add lint rule that headings must increment one level at a time

See merge request gitlab-org/gitlab-ce!30376

Also fixes instances in Markdown that broke the rule.