Migrate button toggle for shared project runners to Vue

See merge request gitlab-org/gitlab!48452

To remove ambiguity with the current UI for enabling/disabling shared
runners in project settings, this MR replaces the button with a toggle
element. This is also consistent with our usage of toggles in the other
runner settings.

To do this, the UI has been ported to Vue while the POST endpoint
`toggle_shared_runners` has been modified to return the response in
JSON format.

The changes are gated by the `:vueify_shared_runners_toggle` feature
flag.

Fix duplicate author showing up in autocomplete

See merge request gitlab-org/gitlab!49782

Fix user status update when not_set availability is given

See merge request gitlab-org/gitlab!49592

Geo: Fix Replication Details nav links for enabled replicables

See merge request gitlab-org/gitlab!49731

Resolve "403 proxy responses"

See merge request gitlab-org/gitlab!49593

Provide the information that 403 errors might
originate from outside proxies

Docs: Changed "language to avoid" to "usage list"

See merge request gitlab-org/gitlab!49637

Link Vale rules to the new location for these words.

Update Plan stage feature flag yml definitions

See merge request gitlab-org/gitlab!49569

Make the test more resilient to Project default changes

See merge request gitlab-org/gitlab!49602

Docs: improve code coverage extraction documentation

See merge request gitlab-org/gitlab!49738

Document tip to exclude temporary build files' directories

See merge request gitlab-org/gitlab!49321

The author was already turned into a hash before calling uniq so the
duplicates weren't filtered out.

This also adds the status preloading to the author so that it's included
when we batch load user statuses.

Move the curl test up to error level

See merge request gitlab-org/gitlab!49664

Docs: clean up some Vale substitution warnings

See merge request gitlab-org/gitlab!49636

Replaces some shorthand words to enforce standard

Set "Project limit" and "Can create groups" attributes via SAML attribute statements

See merge request gitlab-org/gitlab!49394

Revert !49502 to fix FOSS master - [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!49776

Document new storage quota totals

See merge request gitlab-org/gitlab!47467

Standardize on 'GB' instead of 'GiB'. Small wording changes.
Change the name of an example company to keep it from triggering
the acronym rule.

Add docs explaining only yarn v1.x is supported

See merge request gitlab-org/gitlab!49715

This reverts merge request !49502

Remove redundant method from field

See merge request gitlab-org/gitlab!49674

Adding a new test for codeowners using an MR

See merge request gitlab-org/gitlab!48143

This test tests the ability to use a codeowner
file with the setting to squash commits and
merge into master.

Update security team handle in code review guidelines

See merge request gitlab-org/gitlab!49767

Update Gitaly version

See merge request gitlab-org/gitlab!49735

Change Default Project Listing Sort Order (to Name)

See merge request gitlab-org/gitlab!47734

Dependency proxy caches the manifest

See merge request gitlab-org/gitlab!48845

Create dependency_proxy_manifests
Add group associations and fixtures

Add the gitlab-experiment gem, with configuration

See merge request gitlab-org/gitlab!45840

- To be used by the experiment library configuration and to identify
differences between feature flag types.
- Fixes minor incorrectness in usage examples.

Add deprecation message about one click GMA

See merge request gitlab-org/gitlab!49557

Fixing the bare minimum of issues that are causing a red pipeline.

Move custom_compliance_frameworks to GL Premium

See merge request gitlab-org/gitlab!49598