Add code for generating Markdown changelogs

See merge request gitlab-org/gitlab!50063

Add docs for application_settings_cache_seconds

See merge request gitlab-org/gitlab!52314

Introduce NestedAttributesDuplicatesValidator for release

See merge request gitlab-org/gitlab!51951

This adds the basic building blocks for generating changelogs from a
list of commits. The output is Markdown, and each release section is
generated using a minimal, custom template language.

In an early iteration we used Liquid, but this was found to suffer from
unresolved security issues. Alternative template languages had their own
share of issues that made using them not an option. The template engine
introduced in this commit is the bare minimum that we need for changelog
generation, and works by compiling the user provided template to an ERB
template; making sure the user can't run arbitrary code. Using ERB
allows us to offload the heavy lifting of a template engine to ERB,
instead of having to write and maintain such an engine ourselves.

The use of a template engine gives users control over how they want to
present their changelog data, without GitLab having to provide
potentially dozens of settings to enable this.

This builds on the changes introduced in merge requests
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/49243 and
https://gitlab.com/gitlab-org/gitaly/-/merge_requests/2842.

See https://gitlab.com/gitlab-com/gl-infra/delivery/-/issues/1369 for
more information.

Change FAQ link on the billing page

See merge request gitlab-org/gitlab!52577

Add a message parameter for the suggestion endpoints

See merge request gitlab-org/gitlab!51245

Add table of available OAuth scopes in the documentation

See merge request gitlab-org/gitlab!52357

Remove onboarding issue tracking

See merge request gitlab-org/gitlab!52349

Update Gitaly version

See merge request gitlab-org/gitlab!52574

Add verify step to uploads migration to object storage details

See merge request gitlab-org/gitlab!38985

Admin dashboard redesign

See merge request gitlab-org/gitlab!52176

Add standard_context to Snowplow test helper [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!52375

Resolve "Add developer docs for banzai benchmarking"

See merge request gitlab-org/gitlab!52229

with new rake command

Do not use attributes_for in UpdateVulnerabilityConfidence spec

See merge request gitlab-org/gitlab!52496

Fix pages migration threads

See merge request gitlab-org/gitlab!52571

Replaced Gold mentions with Ultimate

See merge request gitlab-org/gitlab!52501

Occurrences to be replaced with Ultimate

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/29999

Add parser for cilium alerts

See merge request gitlab-org/gitlab!51996

Cilium alerts were using generic parser
This parser is created to parsing alert coming from KAS

Finish project card

Update user stat card

Update group stat card

Add Changelog

Transparent card footer

Remove div tags

Remove href in span tag

Update Translations

Turn into white bg

Move to card for licence overview

Update licence summary and breakdown

Update Translations

Fix margins

Add separate heading

Update translations

Fix test

Fix test

Update index.html.haml_spec.rb

Update index.html.haml_spec.rb

Move to span

Fix test

Switch to col-md-4

Fix mobile view

Fix Test

Remove feature flag autofix indicator [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!51998

[RUN-AS-IF-FOSS] Extend the interface of (prepend|extend|include)_if_ee helper methods

See merge request gitlab-org/gitlab!51677

Maintain data parity between ExperimentUser & ExperimentSubject

See merge request gitlab-org/gitlab!51659

Update Project/Group Exporter temp folder cleanup

See merge request gitlab-org/gitlab!51969

Package/plan name changes for whats_new

See merge request gitlab-org/gitlab!51648

Update doorkeeper to 5.5.0.rc2 [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!52171

It contains a fix of 2.7 Ruby warning

CHANGELOG:
https://github.com/doorkeeper-gem/doorkeeper/blob/master/CHANGELOG.md

Do not use attributes_for in RemoveDuplicateCsFindings spec

See merge request gitlab-org/gitlab!52497

Remove outdated versions, and other style updates

See merge request gitlab-org/gitlab!52389

Remove old versions and add style updates.

Swap to more sensible shift factory defaults

See merge request gitlab-org/gitlab!52539

[RUN ALL RSPEC] Fix broke CE tests due to merge train pipeline check

See merge request gitlab-org/gitlab!52556