Move commit neighbor buttons to sticky MR controls

See merge request gitlab-org/gitlab!57743

When reviewing an MR commit by commit, there are `Prev` and `Next`
buttons next to the commit message to jump to the neighbor
commits. These are helpful, but they slide outside of view when
scrolling to the bottom.

These buttons were initially introduced in [1].

This changes moves these buttons to the sticky Merge Request controls
bar. This bar remains visible at all times, making the neighbor commit
buttons accessible even when scrolled to the bottom.

1. ee921003 (Add buttons to the Commit Item to navigate among MR
   commits, 2020-05-12)

Fix a typo in DAST feature specs [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!58043

Prevent executing expensive query to show group issues zero state view

See merge request gitlab-org/gitlab!57411

Add aria labels to icon-only buttons

See merge request gitlab-org/gitlab!57610

Replace deprecated Close Milestone button on list view

See merge request gitlab-org/gitlab!57871

mention `rules` in documentation where variables can be used

See merge request gitlab-org/gitlab!57806

Add context selector to exclude tests from jobs

See merge request gitlab-org/gitlab!56916

This module allows tests to be skipped (excluded) based on the job in
which the test runs. It's complimentary to the `:only` tag.

Update metrics definitions for some Usage Pings

See merge request gitlab-org/gitlab!57601

Remove instances of 'simply' from the documentation

See merge request gitlab-org/gitlab!58008

Covert has-tooltip on commit page to pajamas

See merge request gitlab-org/gitlab!57858

- tooltip wasn't acting properly
- align with design

Edited for style and clarity

See merge request gitlab-org/gitlab!58175

Related to: https://gitlab.com/gitlab-org/gitlab/-/issues/300312

Merge branch 'ensure-review-app-is-deployed-automatically-when-review-app-config-is-changed' into 'master'

Ensure Review App is deployed when changing its config

See merge request gitlab-org/gitlab!58100

Remove old unused ADFS screenshots

See merge request gitlab-org/gitlab!58124

Fix N + 1 for MilestonesController#merge_requests

See merge request gitlab-org/gitlab!57980

Fix force_random_password option in Users API

See merge request gitlab-org/gitlab!57751

Previously the API did not correctly handle the force_random_password
option. It was not being treated as one of the 3 viable password-
setting options. This adds it as the 3rd, and fixes the test coverage,
which was not properly testing this use case.

Preload merge requests associations to avoid N + 1
on milestones#show page

Fix Rails/SaveBang offenses in ee/spec/presenters

See merge request gitlab-org/gitlab!58082

Remove `obviously` from docs

See merge request gitlab-org/gitlab!57636

Link to test file in test report widget

See merge request gitlab-org/gitlab!57911

Merge branch 'mk/add-index-for-project-deployments-with-environment-id-and-updated-at' into 'master'

Add index to improve performance of project deployments endpoint

See merge request gitlab-org/gitlab!57554

Remove MR fork spec from smoke suite

See merge request gitlab-org/gitlab!58150

Optimize database query for last deployment

See merge request gitlab-org/gitlab!57979

Fix docs for VSA lead time calculation

See merge request gitlab-org/gitlab!57902

Commits are only associated with issues when they mention an issue
number in the commit message. This removes the documentation that
indicated otherwise.

Remove N+1 DB queries from indexing projects in Elasticsearch

See merge request gitlab-org/gitlab!57794

rubocop: namespace_settings is high traffic table

See merge request gitlab-org/gitlab!57726

Fix documentation typo (singing -> signing)

See merge request gitlab-org/gitlab!57929

Docs for non-latest version of Python with License Compliance

See merge request gitlab-org/gitlab!57019

Clarify what type of changelog for feature flag

See merge request gitlab-org/gitlab!57837

Remove QueryLimiting.disable for API endpoint DELETE /users/:id

See merge request gitlab-org/gitlab!57867