This makes it possible to access static build variables even when an
object is not persisted yet. This will allow us to evaluate build
variables using only/except policies before deciding whether we actually
want to persist the build in the database, or not.

Merge branch 'backstage/gb/populating-pipeline-refactoring' into feature/gb/variables-expressions-in-only-except

* backstage/gb/populating-pipeline-refactoring: (860 commits)
  Add specs for extracted pipeline-related methods
  Bring seeds size method back to CI/CD pipeline class
  Improve YAML processor specs and remove unused code
  Fix static analysis and tests related to YAML processing
  Add specs for pipeline chain that builds stages and jobs
  Do not select included stage seeds in populate chain
  Decouple YAML processor from pipeline objects
  Move policy related specs our of YAML processor tests
  Fix rubocop offense in pipeline build seed class
  Add a guard clause to avoid creating empty stages
  Evaluate only/except policies outside of YAML processor
  Make it easier to test pipeline stage seeds
  Reduce stage seeds coupling between pipeline and YAML
  Add specs for chain element that populates a pipeline
  Populate pipeline with objects before creating it
  Remove legacy service for creating pipeline stages
  Decouple pipeline stage seeds from building environments
  Support building all pipeline resource before saving
  Introduce pipeline build seeds
  Start building abstraction over pipeline seeds
  ...

Conflicts:
	lib/gitlab/ci/yaml_processor.rb
	spec/lib/gitlab/ci/yaml_processor_spec.rb

This is a first step to decouple pipeline from YAML processing. It
reduces the coupling by removing some methods that introduce coupling
and by moving logic into separate chain element that is being used to
populate pipelines with stages and builds.

Update kubeclient 2.2.0 -> 3.0

Closes #43911

See merge request gitlab-org/gitlab-ce!17739

Move UnresolvedDiscussions vue component

See merge request gitlab-org/gitlab-ce!17538

Clarify ambiguous with_artifacts implication

Closes #44138

See merge request gitlab-org/gitlab-ce!17720

Fix dropzone project show

Closes #44137

See merge request gitlab-org/gitlab-ce!17784

 Conflicts:
   Gemfile.lock

Fix "A copy of Gitlab::Metrics::Methods" have been removed error

Closes #44365

See merge request gitlab-org/gitlab-ce!17810

Prettify notes app

See merge request gitlab-org/gitlab-ce!17812

Fixed profile notifications not being editable

Closes #44198

See merge request gitlab-org/gitlab-ce!17808

Resolve "Right column of merge request discussion overflows"

Closes #39521

See merge request gitlab-org/gitlab-ce!17550