This commit adds a reusable accordion as a shared component.

Note: While it tries to keep the component as generic as possible,
it was built with a specific implementation goal.

See this issue for more information:
https://gitlab.com/gitlab-org/gitlab/issues/11190

Update eslint-plugin-import from 2.16.0 to 2.18.2 (/spec/javascripts/[p-r]*)

See merge request gitlab-org/gitlab!21475

Add empty region when group metrics are missing

See merge request gitlab-org/gitlab!20900

The metrics dashboard didn't let users know when data was missing from
a panel. This change is the first step to know why data is missing.

This change makes use of getter to calculate if the a panel group of
the dashboard should be displayed as empty.

Resolve "Cleanup cycle analytics mapped imports"

Closes #37281

See merge request gitlab-org/gitlab!21113

Update help link in MR widget

See merge request gitlab-org/gitlab!21471

Fix indentation for graphql docs

See merge request gitlab-org/gitlab!21532

remove gitlab-ui from capitalization list

See merge request gitlab-org/gitlab!21535

Add after_script timeout details

See merge request gitlab-org/gitlab!21376

Merge branch '36952-migrate-existing-projects-to-hashed-storage-must-handle-design-repositories' into 'master'

Handle design repositories when moving existing projects to Hashed Storage

Closes #36952

See merge request gitlab-org/gitlab!20540

Update reference to frontend guide in Dangerfile message

See merge request gitlab-org/gitlab!17573

Add caps and backtick testing to docs linting

Closes #31185

See merge request gitlab-org/gitlab!20764

Update capitalizations as needed to enable caps linting

only for CE-specific contents under /spec/javascripts/[p-r]

Fixing kramdown link errors in docs

See merge request gitlab-org/gitlab!21452

Changes are required to clean up Kramdown warnings that occur when
building the doc site.

Fix encoding issue with JSON Cache

See merge request gitlab-org/gitlab!21407

Update caching documentation

Closes #33295

See merge request gitlab-org/gitlab!21165

Fix flaky test in releases_controller_spec.rb

Closes #37372

See merge request gitlab-org/gitlab!21519

Install lsb-release for repo URL construction

Closes #39424

See merge request gitlab-org/gitlab!21510

Add API for states by country

See merge request gitlab-org/gitlab!21417

Add post deployment migration to complete Pages metadata migration

See merge request gitlab-org/gitlab!19928

Multiple release objects would be created in the test with the same tag
(v1.1.0), which caused random failures, depending on what the database
returned for Releases.find_by_tag!. Since there is no uniqueness
constraint, we fix this problem by changing the tag to a unique name.

Closes https://gitlab.com/gitlab-org/gitlab/issues/37372

Unquarantine Secure Licence Compliance MR test

Closes #36696

See merge request gitlab-org/gitlab!20744

Backend: Add ability to embed stack trace in gitlab issue

See merge request gitlab-org/gitlab!20799

Add table to store the sentry event and issue ids
that are related to a gitlab issue

Update issue links and add metadata in quarantined tests

See merge request gitlab-org/gitlab!21472

Add border top to Readme file header

Closes #27025

See merge request gitlab-org/gitlab!21314

Fix bug with snippet refactored routes

See merge request gitlab-org/gitlab!21267

Update security-harness for Security remote

See merge request gitlab-org/gitlab!21207

Use feature flags mixin in grouped security reports app

See merge request gitlab-org/gitlab!21251