Enable RSpec profiling only if RSPEC_PROFILING_POSTGRES_URL is not empty

Closes #31933

See merge request !11543

Add descriptions for the RSpec/EmptyExampleGroup and RSpec/ExpectOutput cops

[ci skip]

See merge request !11540

Add note about artifacts previewing in docs

See merge request !11539

Update Prometheus Merge Request widget documentation

Closes #32583

See merge request !11531

Run the schedule worker once an hour by default

See merge request !11476

Add refresh button into MR widget failed state.

Closes #32543

See merge request !11519

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

[ci skip]
Signed-off-by: Rémy Coutable <remy@rymai.me>

Fixes the 500 for custom apearance header logo and logo

See merge request !11479

Remove readme project_view option

See merge request !11425

Render plain README using Markup viewer so it is displayed below tree

See merge request !11510

Consolidate user avatar Vue logic

Closes #31017

See merge request !10718

Fix JavaScript translations that are using a namespace

See merge request !11522

Stop MR conflict code from blowing up when branches are missing

Closes #32544

See merge request !11501

Catch all URI errors in ExternalLinkFilter

Closes #32076

See merge request !11494

Add docs on how to turn off SSL verification on GH oauth

See merge request !11504

Delete merge_request_widget.js

See merge request !11452

In https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/323/ we added support
to disable SSL verification because attempting to import projects from a
self-signed GH Enterprise instance will fail with an SSL error.

Fix clicking disabled clipboard button toolip

Closes #32518

See merge request !11493

Fix ProjectCacheWorker for plain READMEs

Closes #32540

See merge request !11506

Fixes for the rename reserved paths helpers

Closes #32528

See merge request !11492

Enable the RSpec/EmptyExampleGroup cop

See merge request !11497

Enable the RSpec/ExpectOutput cop

See merge request !11500

The ProjectCacheWorker refreshes cache periodically, but it runs outside Rails
context. So include the ActionView helpers so the `content_tag` method is
available.