Eager load event target authors whenever possible

Closes #41618

See merge request gitlab-org/gitlab-ce!16199

Rename db:seed_fu-{pg,mysql} to gitlab:setup-{pg,mysql}

See merge request gitlab-org/gitlab-ce!16234

Merge branch '41468-error-500-trying-to-view-a-merge-request-json-undefined-method-binary-for-nil-nilclass' into 'master'

Resolve "Error 500 trying to view a merge request JSON: undefined method `binary?' for nil:NilClass"

Closes #41468

See merge request gitlab-org/gitlab-ce!16193

Update Kubernetes service documentation

See merge request gitlab-org/gitlab-ce!16212

CE: Unify CE and EE tests in spec/controllers/projects/artifacts_controller_spec.rb

Closes gitlab-ee#3377

See merge request gitlab-org/gitlab-ce!16133

Enable our own custom cops, again?

Closes #41480

See merge request gitlab-org/gitlab-ce!16132

[CE] Move git operations for UpdateRemoteMirrorService into Gitlab::Git

See merge request gitlab-org/gitlab-ce!16023

Prevent excessive DB load due to faulty DeleteConflictingRedirectRoutes background migration

See merge request gitlab-org/gitlab-ce!16205

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

Old merge requests can have diffs without corresponding blobs. (This also may be
possible for commit diffs in corrupt repositories.)

We can't use the `&.` operator on the blobs, because the blob objects are never
nil, but `BatchLoader` instances that delegate to `Blob`. We can't use
`Object#try`, because `Blob` doesn't inherit from `Object`.

`BatchLoader` provides a `__sync` method that returns the delegated object, but
using `itself` also works because it's forwarded, and will work for
non-`BatchLoader` instances too. So the simplest solution is to just use that
with the `&.` operator.

Groups tree enhancements

Closes #40533

See merge request gitlab-org/gitlab-ce!15980

This ensures that the "author" association of an event's "target"
association is eager loaded whenever the "target" association defines an
"author" association. This in turn solves the N+1 query problem we first
tried to solve in
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/15788 but caused
problems when displaying milestones as those don't define an "author"
association.

The approach in this commit does mean that the authors are _always_
eager loaded since this takes place in the "belongs_to" block. This
however shouldn't pose too much of a problem, and as far as I can tell
there's no real way around this unfortunately.

Avoid leaving a push event empty if payload cannot be created

See merge request gitlab-org/gitlab-ce!16214

Handle Gitaly aborted merge due to branch update

Closes gitaly#854

See merge request gitlab-org/gitlab-ce!16116

Include integration tests in CE/EE testing documentation

See merge request gitlab-org/gitlab-ce!16139

Add support for max_count option to Git::Repository#count_commits

See merge request gitlab-org/gitlab-ce!16145

Use a background migration for migrating issues.closed_at

See merge request gitlab-org/gitlab-ce!16083

Improve closed/merged events queries performance on Projects::MergeRequestsController#show.json

See merge request gitlab-org/gitlab-ce!15642

41054-Disallow creation of new Kubernetes integrations

Closes #41054

See merge request gitlab-org/gitlab-ce!16017

Resolve "Resizable file list and commit panel"

Closes #40042

See merge request gitlab-org/gitlab-ce!16178

Use heredoc for long strings so it's easier to read

See merge request gitlab-org/gitlab-ce!16179

Fix API endpoints to edit wiki pages where project belongs to a group

Closes #40453

See merge request gitlab-org/gitlab-ce!16170

If the payload cannot be created for some reason, we could be left with a nil
push event payload, which causes Error 500s when viewing the dashboard. Guard
against this error and log when it happens.

Avoids problems seen in #38823

States this service was deprecated on 10.3 and his behavior depends on
the kubernetes service status. Also includes a link for the release post
for more information.

Merge branch '37843-ci-trace-ansi-colours-256-bold-have-no-css-due-wrongly-ansi2html-light-color-variant-conversion-feature' into 'master'

fix issue #37843

Closes #37843

See merge request gitlab-org/gitlab-ce!15902

Update Auto DevOps template

See merge request gitlab-org/gitlab-ce!16042

Updates documentation for Prometheus and Kubernetes integration

Closes #41432

See merge request gitlab-org/gitlab-ce!16156

Both the post-deploy and background migration.

Handle GitLab hashed storage repositories using the repo import task

Closes #39870

See merge request gitlab-org/gitlab-ce!16027

Resolve "reStructuredText rendering of definition lists"

Closes #13355

See merge request gitlab-org/gitlab-ce!16202

Pre commit prettier

See merge request gitlab-org/gitlab-ce!16061