- There's no need to use `API::Scope` for scopes that don't have `if`
  conditions, such as in `lib/gitlab/auth.rb`.

- To represent an authorization scope, such as `api` or `read_user`
- This is a better abstraction than the hash we were previously using.

- Use a struct for scopes, so we can call `scope.if` instead of `scope[:if]`

- Refactor the "remove scopes whose :if condition returns false" logic to use a
  `select` rather than a `reject`.

1. Get the spec for `lib/gitlab/auth.rb` passing.

  - Make the `request` argument to `AccessTokenValidationService` optional -
  `auth.rb` doesn't need to pass in a request.

  - Pass in scopes in the format `[{ name: 'api' }]` rather than `['api']`, which
  is what `AccessTokenValidationService` now expects.

2. Get the spec for `API::V3::Users` passing

2. Get the spec for `AccessTokenValidationService` passing

- They are not included automatically since `API::Users` does not inherit from
  `API::API`, as I initially assumed.

- Scopes declared in `API::API` are considered global (to the API), and need to
  be included in all cases.

- Test `GET` endpoints to check that the scope is allowed.
- Test `POST` endpoints to check that the scope is disallowed.
- Test both `v3` and `v4` endpoints.

- Scope declarations of the form:

    allow_access_with_scope :read_user, if: -> (request) { request.get? }

  will only apply for `GET` requests

- Add a negative test to a `POST` endpoint in the `users` API to test this. Also
  test for this case in the `AccessTokenValidationService` unit tests.

- Declaring an endpoint's scopes in a `before` block has proved to be
  unreliable. For example, if we're accessing the `API::Users` endpoint - code
  in a `before` block in `API::API` wouldn't be able to see the scopes set in
  `API::Users` since the `API::API` `before` block runs first.

- This commit moves these declarations to the class level, since they don't need
  to change once set.

Refactor emoji helpers in preparation for async loading

See merge request !12432

[ci skip]

Ignore JSON files generated from PO files

See merge request !12329

Fix head pipeline stored in merge request for external pipelines

Closes #34130

See merge request !12478

[ci skip]

Update mmap2 gem to fix missing symbol error that happens on some installations from source

Closes #34221

See merge request !12492

Make the SimpleExecutor rescue exceptions in the executing Checks

See merge request !12487

Update mmap2 gem tha disables mmap_obj.gsub! as current implementation uses method that is no longer part of Ruby API

ruby 2.4 compat: update to webmock 2.3.2

See merge request !12471

Update templates for 9.3

See merge request !12461

Update dependencies list for 9.3

See merge request !12462

Fix application error when Project#last_activity_at is nil

Closes #34276

See merge request !12443

Slightly refactor pipeline schedules form in preparation for additions

See merge request !12134

Refactor group members tests

See merge request !12465

Adjust commit partial cache key to fix browse buttons

Closes #26899

See merge request !12393

Merge branch '34014-submitting-reply-to-existing-diff-discussion-using-cmd-ctrl-enter-submits-twice-and-refreshes-page' into 'master'

Resolve "Submitting reply to existing diff discussion using Cmd/Ctrl+Enter submits twice and refreshes page"

Closes #34014

See merge request !12352

Resolve "Submitting reply to existing diff discussion using Cmd/Ctrl+Enter submits twice and refreshes page"

Clean up Gitlab::Git::Commit.find_all

See merge request !12476

Merge branch '34115-unable-to-access-edit-comment-from-dropdown-menu-in-certain-screen-sizes' into 'master'

Resolve "Unable to access edit comment from dropdown menu in certain screen sizes"

Closes #34115

See merge request !12421

Supplement Traditional Chinese in Hong Kong translation of Project Page & Repository Page

Closes #33442

See merge request !11995

Supplement Bulgarian translation of Project Page & Repository Page

Closes #33561

See merge request !12083