* Add design-at-version resolution

This adds separate singular and plural resolvers for design-at-version,
with tests and references in the design-type.

DesignsAtVersionResolver is nested under Version - This reflects the
fact that this particular resolver requires that it is mounted on a
version

This also importantly ensures that only singular arguments are passed in
singular context, and only plural ones in plural context. Mutually
incompatible arguments are detected and raised as errors.

Equally importantly, this ensures that any objects we fetch by ID have
to pass the same reference checks as the other ways of resolving them,
and they must be coherent with  the implicit version context, and
visible at that version.

Three variants of version resolvers are distinguished:

* when there is no relevant context (e.g. top level):
  - singular resolver able to retrieve versions by ID
* when there is a relevant context (a source of versions)
  - plural resolver to find all versions up-to a given version
  - singular resolver to find a version by ID or SHA

Resolvers are split up into custom singular versions where this makes
code simpler.

Single resolvers return self as single form

This introduces a shared context for efficiency

* Add current_user method to base resolver

  This is used often enough to be of general utility

* Allow resolving lazy values when calling resolvers

  Have distinct resolve and eager_resolve methods, so that tests can
  decide if they want laziness handled transparently or not.

* Add Design.visible_in? method and specs

  This tests that a design is visible at a particular version.

* Improve Designs finder

  Finders should return none when given empty arrays

  Adds missing parameter to documentation comment on DesignsFinder

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

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

Signed-off-by: Rémy Coutable <remy@rymai.me>

Adds wait_for_requests to protect_branch call

Closes #196521

See merge request gitlab-org/gitlab!23251

Parse DAST reports using the common report format

Closes #33913

See merge request gitlab-org/gitlab!22413

Added specific DAST report examples

This reverts commit 5b9bdbb0, reversing
changes made to 65a22395.

Extract Epics System Note Service

See merge request gitlab-org/gitlab!18161

Add ability to add data to tracking events

See merge request gitlab-org/gitlab!23248

Move Phabricator import workers to correct location

See merge request gitlab-org/gitlab!23424

Allow to soft delete issuables description history

See merge request gitlab-org/gitlab!21439

Let users soft delete issuabbles description history
versions.

Add missing column on "Changing Column Types"

See merge request gitlab-org/gitlab!23367