This reverts merge request !20591

Update Elasticsearch development docs for new versions

Closes #197289

See merge request gitlab-org/gitlab!23257

This also removes Homebrew instructions as 6.x is not available

Resolve "Condev topic renamed without redirect"

Closes #197873

See merge request gitlab-org/gitlab!23356

Make merge trains in QA tests independent

See merge request gitlab-org/gitlab!23304

If multiple tests use the same project they'll use the same merge
train. That can cause tests to fail if one tries to use the merge
train while it's in an unexpected state, e.g., trying to start a new
train when one is already running.

This creates a separate project for each test that uses a merge
train.

Uses the Commit API to add a file because it's faster than
pushing.

Adds a runners_token attribute to the Group resource, and lets
resources be reloaded so updated data can be fetched. It's not
clear why the runners token isn't available immediately upon
creating a group, but reloading the API data fixes it.

Add initial draft of scalability documentation

See merge request gitlab-org/gitlab!18976

Add section on renaming tables to downtime guide

See merge request gitlab-org/gitlab!20809

Update the directory for unshifting

Closes #198274

See merge request gitlab-org/gitlab!23473

Fixes typos on Feature proposal template

See merge request gitlab-org/gitlab!23472

Path of file changed in https://gitlab.com/gitlab-org/gitlab/merge_requests/23335 but reference to directory did not
Closes https://gitlab.com/gitlab-org/gitlab/issues/198274

While preparing a feature proposal I found some typos, so this commit
fixes them

Fix specs for CHROME_HEADLESS=0

See merge request gitlab-org/gitlab!23360

Alerting E2E test

See merge request gitlab-org/gitlab!20591

Check for minimal count of performance bar metrics

Closes #197135

See merge request gitlab-org/gitlab!23270

Docs: add nav steps to get to Code Review

See merge request gitlab-org/gitlab!23440

Resolve "New integrations are not active by default"

See merge request gitlab-org/gitlab!23009

To use new default where services are activated by default

Covers PostgreSQL, PgBouncer, Redis, and Sidekiq

Adds the alias for jest tests

Closes #196877

See merge request gitlab-org/gitlab!23095

Replace underscore with lodash in ./spec/js

Closes #196578

See merge request gitlab-org/gitlab!22944

Add babel-lodash for tree shaking
and nice import statements.

[ci skip]

[ci skip]

Add docs for copy from spreadsheet feature

See merge request gitlab-org/gitlab!23426

Revert "Merge branch '118442-restyle-changes-header-and-file-tree' into 'master'"

See merge request gitlab-org/gitlab!23428

Remove save function logic from list.js

See merge request gitlab-org/gitlab!21391

This documents the feature implemented in GitLab 12.7:
https://gitlab.com/gitlab-org/gitlab/merge_requests/22290

Get duplicate dashboard feature on its own section

Closes #197992

See merge request gitlab-org/gitlab!23448

Prune flaky examples after 30 days

See merge request gitlab-org/gitlab!23335

Add missing introduced notes for 12.7

See merge request gitlab-org/gitlab!23446

Merge branch '196843-fix-giant-loader-in-container-registry-expiration-policy-settings' into 'master'

Contain registry expiration policy adjust loader and use toast

See merge request gitlab-org/gitlab!23242

- move isLoading to form
- add loader to save button
- add $toast
- wire $toast to actions
- update unit tests

Add a new 'QA failure' issue template

See merge request gitlab-org/gitlab!22880