Addresses reviewer feedback

Changelog: changed
EE: true

chore: Clarify "Approvers" filter usage

See merge request gitlab-org/gitlab!81929

Add some wording to better distinguish "Approver" from "Approved-By"

Fix "Search for Code References" section is not properly located

See merge request gitlab-org/gitlab!82182

Add rule to enforce using clear instead of deselect

See merge request gitlab-org/gitlab!82058

Fix metadata tag for registry tests

See merge request gitlab-org/gitlab!79943

Removed obsolete HAML

See merge request gitlab-org/gitlab!80628

This removes some obsolete HAML:

* In app/views/ci/variables/_variable_row.html.haml, some code was
  guarded by a condition that always evaluates to false and has thus
  been removed.
* The app/views/shared/buttons/_project_feature_toggle.html.haml view
  has been deleted as it's not used anywhere anymore. From now on, we
  should use the Pajamas-complient _gl_toggle.html.haml view.

Migrate IDE to use GlModal for discarding changes

See merge request gitlab-org/gitlab!81516

Disable clusters API if :certificate_based_clusters is disabled

See merge request gitlab-org/gitlab!81867

Docs: Correct feature flag link in upgrade page

See merge request gitlab-org/gitlab!82244

Remove the `container_expiration_policies_historic_entry` feature flag

See merge request gitlab-org/gitlab!80826

Fix jh pipeline failure of secure_binaries_ci_yaml_spec.rb

See merge request gitlab-org/gitlab!81981

Add method to query related epics of an epic

See merge request gitlab-org/gitlab!81422

- Add permissions check
- Add specs

Add hint about short expiries on token to group import

See merge request gitlab-org/gitlab!81323

* Improve security by suggesting users to use short-living tokens

Changelog: added

Update rule/yaml mode screenshots

See merge request gitlab-org/gitlab!82229

Allow tags as target of pipeline schedules

See merge request gitlab-org/gitlab!81476

Changelog: changed

Self-monitoring docs deprecation warnings

See merge request gitlab-org/gitlab!81923

Add finding failures in console

See merge request gitlab-org/gitlab!82222

Add metrics widget extension

See merge request gitlab-org/gitlab!80345

Add a proofreader

See merge request gitlab-org/gitlab!81860

Add new proofreader

See merge request gitlab-org/gitlab!75458

Deprecation MR for Self-Monitoring

See merge request gitlab-org/gitlab!81921

Ignore requirements_management_test_reports.requirement_id column

See merge request gitlab-org/gitlab!82134

Don't create partitions for geo rake tasks

See merge request gitlab-org/gitlab!82028

Migrate legacy spinner - delete milestones button

See merge request gitlab-org/gitlab!81840