Introduce `default:` configuration entry setting that makes it possible
to configure a default value of an entry, what overrides class-level
`def self.default` value.

This commit refactors only/except policies so that these policies could
be self-contained. This also adds some changes to YAML configuration
library to provide more context to default entry value fabrication
process.

Fix broken MR coach link

See merge request gitlab-org/gitlab-ce!24327

Resolve "undefined method `count_of_extra_tags_not_shown'"

Closes #56311

See merge request gitlab-org/gitlab-ce!24354

Fixes several ActionController::Parameters deprecations

See merge request gitlab-org/gitlab-ce!24332

Bump kubectl in Auto DevOps to 1.11.6

See merge request gitlab-org/gitlab-ce!24176

Bump nginx-ingress chart to 1.1.2

See merge request gitlab-org/gitlab-ce!24203

web-terminal: Add support for URL to Link parsing

See merge request gitlab-org/gitlab-ce!24242

- Add tests for project topics

Update gitlab-styles to 2.5.1

See merge request gitlab-org/gitlab-ce!24336

Move job cancel button

Closes #55944 and #54812

See merge request gitlab-org/gitlab-ce!24074

Rename Add style proposal

See merge request gitlab-org/gitlab-ce!24353

Docs: Update link title, we support more than GKE

See merge request gitlab-org/gitlab-ce!24347

Refactor the API OAuth docs

See merge request gitlab-org/gitlab-ce!24295

Documentation: In Project Members page, add serial comma

See merge request gitlab-org/gitlab-ce!24348

Fix indentation and markup for Markdown codeblock

See merge request gitlab-org/gitlab-ce!24321

docs: emoji cheat sheet with shortcodes

Closes #42672

See merge request gitlab-org/gitlab-ce!24320

Fix add_deploy_key_spec.rb

Closes gitlab-org/quality/nightly#29

See merge request gitlab-org/gitlab-ce!24311

Fix Danger commit message errors

See merge request gitlab-org/gitlab-ce!24337

Update url placeholder for the sentry configuration page

Closes #56276

See merge request gitlab-org/gitlab-ce!24338

Merge branch '55884-adjust-emoji-and-cancel-buttons-height-in-user-status-modal-when-emoji-is-changed' into 'master'

Adjust emoji and cancel buttons height in user status modal when emoji is changed

Closes #55884

See merge request gitlab-org/gitlab-ce!24173

Allow brackets in task lists

Closes #56083, #45599, and #37990

See merge request gitlab-org/gitlab-ce!18514

List Sentry Errors in GitLab - Frontend

Closes #55178

See merge request gitlab-org/gitlab-ce!23770

Create an MR for RCs when preparing security MRs

See merge request gitlab-org/gitlab-ce!24319

Remove Webhooks from import/export help

See merge request gitlab-org/gitlab-ce!24314

Fix deprecation: Passing an argument to force an association to reload is now deprecated

See merge request gitlab-org/gitlab-ce!24136