Fix transient failure in TodoService spec

See merge request !9797

# Conflicts:
#	doc/api/v3_to_v4.md

For reasons unknown, the lack of `and_call_original` on this message
expectation was causing a transient failure depending on test order. We
narrowed it down using `rspec --bisect` to the following order:

    spec/requests/openid_connect_spec.rb:123 spec/services/todo_service_spec.rb:751

Fix go-get support for projects in nested groups

See merge request !9793

GET "projects/:id/repository/commits" endpoint improvements

Closes #1381 and #20207

See merge request !9679

Clear AR connections before starting Sidekiq

Closes gitlab-com/infrastructure#1139

See merge request !9773

API v4 doc changes

See merge request !9723

API: Get list of jobs for a pipeline

Closes #26843

See merge request !9727

`Kaminari.paginate_array` takes some options, most relevant of which is
a `total_count` parameter. Using the `commit_count` for `total_count`
lets us correctly treat the return of `Repository#commits` as a subset
of all the commits we may wish to list.

Addition of a new `Repository#commit_count_for_ref` method was
necessarry to allow the user to start from an arbitrary ref.

Ref #1381

Remove unecessary endpoint from repository, add compatibility endpoints for v3 and several improvements

Allow issues in boards to be ordered

Closes #21264

See merge request !8916

This should ensure that connections obtained before starting Sidekiq are
not leaked, leading to connection timeouts.

Fixes gitlab-com/infrastructure#1139

And V4 is the preferred version to be used, because V3 will be removed
in 9.4 (or later).

It returns all projects visible for the authenticated user, not just
the project they are member of.

It was actually not used anywhere.

Since issues also accepts the query parameter iids[]=, also make it
possible query scope like that.

Add endpoint to get the jobs scoped to a pipeline.

Align bulk update issues button to the right

Closes #18962

See merge request !8591

[ci skip]

consistent padding on new MR panels

Closes #28230

See merge request !9568

Add cop to ensure reversibility of add_concurrent_index

See merge request !9771

Refactor dropdown_assignee_spec

Closes #27568

See merge request !9711

Fix access token specs

See merge request !9776

Rename BUILD to JOB in CI Variables

Closes #29053

See merge request !9756

de37dcee was a manual merge, which meant
it didn't have a build, so I broke master :-(

Swallow collection errors in RspecProfiling

Closes #29005

See merge request !9765

Namespace can have only one chat team

See merge request !9769

Rename priority sorting option to label priority

See merge request !9746