Fixed random failures with Poll spec

Closes #30824

See merge request !10654

Remove heading and trailing spaces from label's color and title

See merge request !10603

Include CONTRIBUTING.md file when importing .gitlab-ci.yml templates

See merge request !10653

Improve the testing documentation

Closes #29499 and #29623

See merge request !10161

Set user contribution calendar `overflow-x: scroll` more precisely

Closes #30738

See merge request !10636

removes redundant code from database.rb

Closes #29056

See merge request !10583

Improve discussion_comments_spec perf

See merge request !10648

Fix grammar

See merge request !10639

Resolve "Update Pipelines documentation"

Closes #27755

See merge request !10600

Correctly waits for requests to finish before testing anything.
Previously it was waiting for a set amount of time which could possibly
cause failures dependant on how quickly these execute

Stops any polling requests once done so that the error callback doesn't
get called with a 404

Closes #30824

Return nil as coverage instead of a File object

See merge request !10633

Let uses hide verbose output by default

See merge request !10650

[ci skip]

Fix outdated 'Admin area' link label in GitLab QA

Closes gitlab-qa#41

See merge request !10646

Api fix build events rename to Job events

Closes #30412

See merge request !10586

Use gRPC 1.2.2

Closes #30766

See merge request !10589

Given a valid pipeline job, and a regex which wouldn't match to a jobs
trace, the stream of the trace would return the File object. This was
not the case when it matched a value, as that would have been return
from the block.

Now the `extract_coverage` method returns `nil` if no match was found.

Hide new subgroup button if user has no permission to create one

Closes #30139

See merge request !10627

Setup and run a Gitaly server for testing if GitalyClient is enabled

See merge request !10298

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

Fix issue's note cache expiration after delete

Closes #30457

See merge request !10461

[ci skip]

When renaming, the argument on the projects hook API was forgotten. Now
one could successfully set it again.

The fix is a little ugly stylewise, but needed as the underlying model
still refers to it as build_events. This commit is to fix it, later we
should migrate the data to a new column. The edit on the spec file makes
sure it passes now, and will fail when we migrate the column.

[BB Importer] Save the error trace and the whole raw document

See merge request !9604

Documentation topic: Authentication

Closes #30744

See merge request !10608

Link to outdated diff in older MR version from outdated diff discussion

Closes #27865

See merge request !10572

Resolve "API: Separate CE params to avoid wrong conflict resolutions"

Closes #28017

See merge request !10484

Fixed notebooklab code including file paths

See merge request !10629

Update installation and upgrading guides

[ci skip]

See merge request !10621

Fix "Edit" button on blame page without repo permissions

Closes #30636

See merge request !10598

Update licenses.csv

[ci skip]

See merge request !10620