Add `environment` drop down to Metrics dashboard

Closes #45738

See merge request gitlab-org/gitlab-ce!19833

Port of EE refactoring to extract EE lines from boards

See merge request gitlab-org/gitlab-ce!19486

Update OmniAuth Shibboleth gem to latest

See merge request gitlab-org/gitlab-ce!20354

Resolve "Failing ESLint on master"

Closes #48853

See merge request gitlab-org/gitlab-ce!20384

Enable Capybara/FeatureMethods cop

See merge request gitlab-org/gitlab-ce!20383

fix failing spec test in gcp_spec

Closes #48855

See merge request gitlab-org/gitlab-ce!20386

Update the cloud-native trigger call in the UI

Closes charts/gitlab#565

See merge request gitlab-org/gitlab-ce!20340

for handling multi-valued SAML assertions. Add documentation
of label argument for omniauth provider to override text
in login button.

Resolve "Add Metrics to Operations Tab"

Closes #45739

See merge request gitlab-org/gitlab-ce!20025

Add option to add README when creating a project

Closes #19468

See merge request gitlab-org/gitlab-ce!20335

Backport of EE changes: Allow Labels::FindOrCreateService to find ancestor group labels

Closes #4266

See merge request gitlab-org/gitlab-ce!20364

Resolve "Change new cluster page design to use tabs"

Closes #43446 and #46304

See merge request gitlab-org/gitlab-ce!18963

Fix 'only' regex for the review-docs job

See merge request gitlab-org/gitlab-ce!20367

Enable frozen string in apps/validators/*.rb

See merge request gitlab-org/gitlab-ce!20220

Revert "Merge branch '44726-cancel_lease_upon_completion_in_project_cache_worker' into 'master'"

See merge request gitlab-org/gitlab-ce!20366

Port of Todos for epics

See merge request gitlab-org/gitlab-ce!19908

Allow Labels::FindOrCreateService to find ancestor group labels
Add authentication check on API endpoint
Update flayignore

Update Workhorse to v5.0.0

See merge request gitlab-org/gitlab-ce!20370

This reverts merge request !20103

Port of EE-translations

See merge request gitlab-org/gitlab-ce!20362

Remove more Gitaly feature flags

Closes gitaly#329, gitaly#320, gitaly#323, and gitaly#328

See merge request gitlab-org/gitlab-ce!20343

Remove the use of `is_shared` of `Ci::Runner`

See merge request gitlab-org/gitlab-ce!20172

Fix flaky spec for merge request lists

See merge request gitlab-org/gitlab-ce!20316

Use serialize_keys as part of highlight diff cache key

Closes #48801

See merge request gitlab-org/gitlab-ce!20360

Add workhorse authorize method for project/group uploads

Closes #44663

See merge request gitlab-org/gitlab-ce!19717

Improve error message across IDE store modules

Closes #47323

See merge request gitlab-org/gitlab-ce!20272

New Crowdin translations

See merge request gitlab-org/gitlab-ee!6299

Bump Carrierwave gem to 1.2.3 (which contains the monkey patch for memory consumption)

Closes #46182

See merge request gitlab-org/gitlab-ce!20287

This assures that old cache is not used if we change format of
cached data.