Add specs for missing cases

- Fix styling

- This could, given the order of the params, assign the
wrong params to the expected user.

- Add specs for mutation

 -Move shared logic to base
- Update docs

Add DISTINCT to the CTE queries for hierarchies [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!56509

DevOps Adoption[FE] Allow users to select multiple groups

See merge request gitlab-org/gitlab!56073

Allow mutliple groups to be added / removed
via the devops adoption groups modal.

Pipeline Graph Structural Update: Adjust Links Rendering

See merge request gitlab-org/gitlab!56554

Link to "Blob unknown to registry" troubleshooting to issue 209008

See merge request gitlab-org/gitlab!56634

Add the ability to cherry pick accross forks [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!55970

Added the ability to cherry-pick accross forks

Enable specialized project share worker feature flag

See merge request gitlab-org/gitlab!56606

Replace stubbed dastProfiles.branch GraphQL field

See merge request gitlab-org/gitlab!56604

Update to btn-default and selected class in toggle comment button

See merge request gitlab-org/gitlab!56090

Add docs link for license compliance mr widget

See merge request gitlab-org/gitlab!55474

Implement needs:job:optional for CI pipelines [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!55468

With this, we provide a new keyword for needs:job => optional
When a job is not added to the pipeline and another job needs that job,
the pipeline will start.

Jira Issue: Fix comments' datetime

See merge request gitlab-org/gitlab!56560

Fix remaining EE offenses for FactoryBot/InlineAssociation [RUN ALL RSPEC]

See merge request gitlab-org/gitlab!56241

Fix nested img > a in users_list

See merge request gitlab-org/gitlab!56589

Add GraphQL mutation to update release asset link

See merge request gitlab-org/gitlab!56265

Improve Service Desk empty states

See merge request gitlab-org/gitlab!54006

Make the Service Desk empty and info states friendlier.

Custom Mapping documentation

See merge request gitlab-org/gitlab!55663

Added images for emoji gem version upgrade

See merge request gitlab-org/gitlab!56639

Add #expand_variable_collection to Variables::Collection

See merge request gitlab-org/gitlab!54507

Base changes from throughput to new metrics terms

See merge request gitlab-org/gitlab!55777

Add missing Jira enforcement check in Project Setting

See merge request gitlab-org/gitlab!56576

Update package list logic for license compliance

See merge request gitlab-org/gitlab!55466

* If we have 0 packages for a license then show empty string

Import remaining metrics definitions

See merge request gitlab-org/gitlab!55846

Add documentation for environment tier [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!56081

This commit adds the documentation for environment tier
feature that was added in GitLab 13.10.