Use `sign_in` instead of `login_as` when we're not testing login flow

See merge request !10296

Resolve "Expandable folders for environments"

Closes #28732

See merge request !10290

Prevent clicking on disabled button

Closes #29432

See merge request !9931

Refactor test_utils bundle

See merge request !10437

Fetch the default number of commits (20) for docs:check jobs

Closes #30451

See merge request !10449

This is a proof of concept for gitlab-org/gitlab-ce#30196.

The actual login procedure is well-tested by
`spec/features/login_spec.rb`, and we don't gain anything by also
thoroughly testing it here, in our second-slowest feature spec. In fact,
it only slows us down!

So instead we use `sign_in` from the `Devise::Test::IntegrationHelpers`
module, which just sets the current user at the Warden level. This
drastically reduces the "setup" phase of every test in this file. A
non-scientific test run saw this drop from 633 to 231 seconds.

Fixes milestone/merge_request API endpoint to really scope the results

See merge request !10369

Fix issues importing forked projects

Closes #26184 and #29380

See merge request !9102

Fixed issue boards having a vertical scrollbar

Closes #30209

See merge request !10312

Fix blob highlighting in search

Closes #30400

See merge request !10420

Pass GitalyAddress to workhorse

See merge request !10447

Signed-off-by: Rémy Coutable <remy@rymai.me>

Improved Environments Metrics UX

Closes #29227

See merge request !9946

Delete unused icons; add empty lines to svg files

See merge request !10415

Disable support for Gitaly PostReceivePack

See merge request !10444

Bump Gitaly server version to 0.5.0

See merge request !10446

list recommended version of PostgreSQL

See merge request !10190

Adds git terminal prompt env var to application rb

Closes #24187

See merge request !10372

remove useless queries with false conditions (e.g 1=0)

Closes #29492

See merge request !10141

Don't autofill kubernetes namespace

See merge request !10438

Backport differences in global search from EE to CE

See merge request !10445

Improves Jira integration documentation

Closes #29670

See merge request !10067

Add long polling diagrams

See merge request !10270

Update patch_versions.md, add `yarn:install` in `Clean up assets and cache` command.

See merge request !10442

Remove index for users.current sign in at

Closes #29523

See merge request !10401

Split status and confidentiality action

See merge request !10443

See https://gitlab.com/gitlab-org/gitaly/issues/172

Backport API changes needed to fix sticking in EE

See merge request !10376

Ensure we generate unique usernames otherwise validations fail

See merge request !10436