Use Helm 3 for GitLab-managed apps in new clusters [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!46267

With this change, any existing cluster will continue to use
Helm 2, while all new clusters will use Helm 3 for GitLab-managed apps.
Note that this only applies to GitLab-managed apps -- Auto DevOps
uses its own Helm version on a per-project basis.

The diff looks big because we split the Helm command classes into two
modules, V2 and V3, to allow them to evolve independently as long as
they both implement the same minimal interface.

The command classes in the V2 module should be exactly equal to their
old counterparts, besides the addition of BaseCommand#helm_version,
which the common Kubernetes pod generator uses to resolve the container
image.

The command classes in the V3 module are ports of the relevant subset of
commands. There are more classes in the V2 module because we carried
along support for in-cluster Tiller. This is currently unused, but may
be used to clean up Tiller if we decide to offer Helm 2 to 3 migration
in the product later on.

See also https://gitlab.com/gitlab-org/gitlab/-/issues/120021

Refactor build/bridge codes by using processable

See merge request gitlab-org/gitlab!46762

Here, we are moving same codes into processable

Check if all replication and verification succeeded

See merge request gitlab-org/gitlab!46785

Resolve "Follow-up from "Add Sample Data" - Move override_date_attributes to RelationFactory"

See merge request gitlab-org/gitlab!45760

- Fix specs for date calculator
- Fix wrong guard logic
- Fix rubocop offences
- Extract logic to sample relation factory
- Add Sample::RelationFactory
- Rename SampleDataRelationTreeRestorer
- Fix Importer
- Add param for mark_as_consumed

Merge branch '241957-remove-v-html-from-app-assets-javascripts-notes-components-discussion_filter_note-vue' into 'master'

Replace v-html with GlSprintf in discussion_filter_note.vue

See merge request gitlab-org/gitlab!41482

Remove release `issues_url` and `merge_requests_url` from REST/GraphQL

See merge request gitlab-org/gitlab!46828

Adding a check for pipeline subscription availability

See merge request gitlab-org/gitlab!46712

Enable ci_lint_vue feature flag by default

See merge request gitlab-org/gitlab!46801

Realign DAST site validation frontend with backend

See merge request gitlab-org/gitlab!46475

Fix fake date when called as function

See merge request gitlab-org/gitlab!46921

Add reposition_note permission

See merge request gitlab-org/gitlab!45957

This works as an alias of `admin_note` unless the noteable is a Design,
in which case it will be true if the user can `create_note`.

This allows us to make a new mutation for repositioning a note on a
Design which will allow users who did not create the note to
reposition it.

https://gitlab.com/gitlab-org/gitlab/-/issues/207334

Remove ci_send_deployment_hook_when_start Feature Flag

See merge request gitlab-org/gitlab!46905

Improve vulnerability issue/MR creation errors

See merge request gitlab-org/gitlab!46589

Fix the application worker structured payload

See merge request gitlab-org/gitlab!46903

Compute UUID before creating or updating Finding

See merge request gitlab-org/gitlab!46483

Additional, minor changes:
* Remove debugging logs
* Update specs

Fix typo in PRIVATE-TOKEN in API docs

See merge request gitlab-org/gitlab!46933

Update docs guide for lefthook

See merge request gitlab-org/gitlab!46852

Add project with alerts created metric

See merge request gitlab-org/gitlab!46636

Forbid top level route sitemap

See merge request gitlab-org/gitlab!46677

Fix incorrect usages of createFlash

See merge request gitlab-org/gitlab!46883

Fix issue header data

See merge request gitlab-org/gitlab!46888

Update buttons in ee/app/views/shared/billings directory

See merge request gitlab-org/gitlab!46862

Update ee/app/views/shared/billings/_billing_plan.html.haml, ee/app/views/shared/billings/_billing_plan_header.html.haml files

Document that you can run lefthook manually

See merge request gitlab-org/gitlab!46897

Add DAST recommendation about the importance of authentication

See merge request gitlab-org/gitlab!46913

Add API post /invitations by email

See merge request gitlab-org/gitlab!45950

Add Vulnerabilities::FindingLink model

See merge request gitlab-org/gitlab!46555

This change adds new model to store finding links in database.