Generate KUBECONFIG in KubernetesService#predefined_variables

Closes #33360

See merge request !12223

Fix `migration:path` build for "Honor the 'Remember me' parameter for OAuth-based login"

Closes #34713

See merge request !12668

Add foreign keys to various tables that point to the "projects" table

See merge request !9388

Update Prometheus Metrics Library

See merge request !12621

Fix stubbing attributes alongside cache_markdown_field

Closes #34698

See merge request !12661

This cop has been renamed to ActiveRecordSerialize to match the way
"ActiveRecord" is usually written.

These IDs point to non-existing rows, causing the foreign key
constraints to fail.

This is allowed for existing instances so we don't end up 76 offenses
right away, but for new code one should _only_ use this if they _have_
to remove non database data. Even then it's usually better to do this in
a service class as this gives you more control over how to remove the
data (e.g. in bulk).

This removes the need for relying on Rails' "dependent" option for data
removal, which is _incredibly_ slow (even when using :delete_all) when
deleting large amounts of data. This also ensures data consistency is
enforced on DB level and not on application level (something Rails is
really bad at).

This commit also includes various migrations to add foreign keys to
tables that eventually point to "projects" to ensure no rows get
orphaned upon removing a project.

Add user projects API

Closes #33657

See merge request !12596

Fix a nasty transient failure happening is a subsequent spec

Closes #34698

See merge request !12664

Fix invalid integer value when more than 1000 commits

Closes #34711

See merge request !12659

* upstream/master: (888 commits)
  Fix Rubocop offense
  Use a previous approach for cycle analytics dummy pipeline
  Allow admin to disable all restricted visibility levels
  Removes file_name_regex from Gitlab::Regex
  Remove IIFEs around several javascript classes
  Update CHANGELOG.md for 9.3.5
  Add ProjectPathHelper cop
  Create and use project path helpers that only need a project, no namespace
  Handles realtime with 2 states for environments table
  Revert "Merge branch '18000-remember-me-for-oauth-login' into 'master'"
  Allow creation of files and directories with spaces in web UI
  Disable Flipper memoizer in tests to avoid transient failures
  Introduce cache policies for CI jobs
  fix sidebar padding for full-width items (Time Tracking help)
  Replace 'snippets/snippets.feature' spinach with rspec
  Rename ci_config_file to ci_config_path
  Add back Pipeline#ci_yaml_file_path due to all the troubles
  Revert change to design. Go back to scrollable page
  Fix cycle analytics tests by making pipeline valid
  Fixes the column widths for the new navigation options in settings
  ...

Introduce cache policies for CI jobs

Closes #33772

See merge request !12483

Resolve "Project option to allow customizing CI/CD config path"

Closes #32815 and #33130

See merge request !12509

- This is causing autoload-related errors in the `migration:path` builds. We
  need to find a better way of testing this provider.

- Don't use `request.env['omniauth.params']` if it isn't present.

- Remove the `saml` section from the `gitlab.yml` test section. Some tests
  depend on this section not being initially present, so it can be overridden
  in the test. This MR doesn't add any tests for SAML, so we didn't really need
  this in the first place anyway.

- Clean up the test -> omniauth section of `gitlab.yml`

- Disable an ESLint check rather than work around it (by
  converting `OAuthRememberMe` from a regular class to a
  static class.

- Scope `$` calls inside `OAuthRememberMe`

- Change double quotes to single quotes.
- Why is `OmniAuth.config.full_host` being reassigned in the integration test?
- Use `map` over `map!` to avoid `dup` in the `gitlab:info` rake task
- Other minor changes

- The test for `rake gitlab:env:info` executed the rake task, which mutated the
  list of omniauth providers, breaking subsequent tests relying on this list.

- I've changed the rake task to duplicate the providers list before modifying it.

- I tried to get this to work by stubbing out portions of the config within the
  test. This didn't work as expected because Devise/Omniauth loaded before the
  stub could run, and the stubbed config was ignored.

- I attempted to fix this by reloading Devise/Omniauth after stubbing the
  config. This successfully got Devise to load the stubbed providers, but failed
  while trying to access a route such as `user_gitlab_omniauth_authorize_path`.

- I spent a while trying to figure this out (even trying
  `Rails.application.reload_routes!`), but nothing seemed to work.

- I settled for adding this config directly to `gitlab.yml` rather than go down
  this path any further.

- Added saml, authentiq, cas3, and auth0
- Crowd seems to be a special case that will be handled separately.

- There was previously a test for `saml` login in `login_spec`, but this didn't
  seem to be passing. A lot of things didn't seem right here, and I suspect that
  this test hasn't been running. I'll investigate this further.

- It took almost a whole working day to figure out this line:

    OmniAuth.config.full_host = ->(request) { request['REQUEST_URI'].sub(request['REQUEST_PATH'], '') }

  As always, it's obvious in retrospect, but it took some digging to figure out
  tests were failing and returning 404s during the callback phase.

- Test all OAuth providers - github, twitter, bitbucket, gitlab, google, and facebook

- Pass a `remember_me` query parameter along with the initial OAuth request, and
  pick this parameter up during the omniauth callback from
  request.env['omniauth.params']`.

- For 2FA-based login, copy the `remember_me` param from `omniauth.params` to
  `params`, which the 2FA process will pick up.

- For non-2FA-based login, simply call the `remember_me` devise method to set
  the session cookie.

Fix Rubocop offense

See merge request !12665

Synchronize changes in community translation of msgid

See merge request !12646

Add Italian translations of Commits Page

See merge request !12645

Add Bulgarian translations of Commits Page

See merge request !12411

Add Esperanto translations of Commits Page

See merge request !12410

Add Traditional Chinese in HongKong translations of Commits Page

See merge request !12406