Since it is not possible to dynamically detect if a job is automatically
cancellable or not, a this new attribute is necessary. Moreover, it let
the maintainer of the repo to adjust the behaviour of the auto cancellation
feature to match exactly what he needs.

These are the structural changes for supporting the EE feature of moving
"code_owner_approval_required" state from existing on a project to being
on the protected branches individually, allowing for CODEOWNER
validation on push events.

Add two methods to the axios_utils Jest mock:

- `waitFor(url)`, which returns a Promise that resolves when the
  next request to `url` finishes.
- `waitForAll()`, which returns a Promise that resolves when all
  pending requests finish.

Makes custom Pages domain open as external link in new tab

Closes #66067

See merge request gitlab-org/gitlab-ce!32130

Adjust routable metric

See merge request gitlab-org/gitlab-ce!32591

* Define the counter once.
* Make metric name follow Prometheus naming conventions.
* Add label for call method.

- We're also improving specs to avoid this could happen again

- remove hiding the alert functionality
- use `danger` class instead of `warning`

https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14786