This reflects how we now create or update

If the service fails mid-point, then we should be able to re-run this
service. So, detect presence of any previously created Kubernetes
resource and update or create accordingly.

Fix specs accordingly. In the case of finalize_creation_service_spec.rb,
I decided to stub out the async worker rather than maintaining
individual stubs for various kubeclient calls for that worker.

Also add test cases for group clusters

We remove configure_project_service_account and replace
ClusterPlatformConfigureWorker as they perform exactly the same piece of
work. This also makes GKE cluster creation to be the same as Adding
existing cluster - they both now use another worker to execute
CreateOrUpdateNamespaceService.

Update architecture.md

See merge request gitlab-org/gitlab-ce!23430

HTTPS for JupyterHub installation

See merge request gitlab-org/gitlab-ce!23479

reorder notification settings by noisy-ness

See merge request gitlab-org/gitlab-ce!23490

Updated Katex "Supported Functions" link

See merge request gitlab-org/gitlab-ce!23343

Change auto devops banner link path

Closes #54689

See merge request gitlab-org/gitlab-ce!23476

slightly improve readability

See merge request gitlab-org/gitlab-ce!23466

Bump gpgme gem version from 2.0.13 to 2.0.18

See merge request gitlab-org/gitlab-ce!23491

fixes !54609

Upgrade GitLab Workhorse to v7.3.0

See merge request gitlab-org/gitlab-ce!23489

Add additional scope check to Todo#for_target spec

See merge request gitlab-org/gitlab-ce!23487

This works around a condition where the Issue and the MergeRequest
created by FactoryBoth both had the same ID, which caused `for_target`
to return two records when we only expected one.

Add documentation reference to gitaly-debug

See merge request gitlab-org/gitlab-ce!23386

Backport from gitlab-org/gitlab-ee!6878

See merge request gitlab-org/gitlab-ce!23391

Fix API::Namespaces routing to accept namepaces with dots

See merge request gitlab-org/gitlab-ce!22912

Fix Red/Orange data link markdown

See merge request gitlab-org/gitlab-ce!23461

Resolve "Status Emoji currently replaces avatar on mobile"

Closes #51029

See merge request gitlab-org/gitlab-ce!23408

Remove broken link and fix markdown formatting

See merge request gitlab-org/gitlab-ce!23467

Improve wording on disabling impersonation in api/README

See merge request gitlab-org/gitlab-ce!23472

Externalize strings from `/app/views/invites`

See merge request gitlab-org/gitlab-ce!23205

Move drop_site_statistics to be a post deployment migration

See merge request gitlab-org/gitlab-ce!23455

Upgraded Codesandbox packages

Closes #51210

See merge request gitlab-org/gitlab-ce!23475

ci/config: generalize Config validation into Gitlab::Config:: module

See merge request gitlab-org/gitlab-ce!23443

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/51210

Fix typo in method name "silence_stderr"

See merge request gitlab-org/gitlab-ce!23468

Remove auto deactivation when failed to create a pipeline via pipeline schedules

Closes #41231

See merge request gitlab-org/gitlab-ce!22243

Resolve "mergeUrlParams wrong with fragment url"

Closes #54218

See merge request gitlab-org/gitlab-ce!23193

Extract shared timeline entry component

See merge request gitlab-org/gitlab-ce!23447