With multiple MR assignees, `merge_request.assignee_id` is always nil,
and `merge_request.assignee_ids` isn't in `merge_request.attributes`.
So the existing code doesn't set assignees in the created MR.

This fix gets all the tests passing, but we should also check that no
other associations in the MergeRequest need similar fixups.

Extract preloaded_relations

See merge request gitlab-org/gitlab-ce!27168

Mark disabled pages domain for removal

See merge request gitlab-org/gitlab-ce!26212

Set pages_domain.remove_at when disabling it
Add specs for marking pages domain for removal
Notify user that domain is being removed
Add documentation

Update comments about N + 1 Gitaly calls

See merge request gitlab-org/gitlab-ce!27178

Quarantine a flaky spec in spec/features/issues/user_interacts_with_awards_spec.rb

See merge request gitlab-org/gitlab-ce!27176

Fix SVG icon colors in Related MRs widget

Closes #60249

See merge request gitlab-org/gitlab-ce!27151

Remove a "reopen merge request button" on a "merged" merge request

Closes #54039

See merge request gitlab-org/gitlab-ce!26965

Resolve "Make the `review-deploy` curl the Review App for a 200 response to decide success"

Closes #60229

See merge request gitlab-org/gitlab-ce!27134

CE port of Move "Authorize project access with external service" to Core

See merge request gitlab-org/gitlab-ce!27056

Move Contribution Analytics related spec in spec/features/groups/group_page_with_external_authorization_service_spec to EE

To make sure all known issues are linked to the correct epic, I've gone
through the code base, and updated the comments where required.

[Backport] Support multiple assignees for merge requests

See merge request gitlab-org/gitlab-ce!27089

Fix grammar and try to make clearer how a fork works

See merge request gitlab-org/gitlab-ce!26929

add missing word in docs

See merge request gitlab-org/gitlab-ce!26882

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

Expose pipeline variables via API

Closes #28105

See merge request gitlab-org/gitlab-ce!26501

Used to get the variables via the API endpoint
`/projects/:id/pipelines/:pipeline_id/variables`
Signed-off-by: Agustin Henze <tin@redhat.com>

Enable ESLint rule jest/no-identical-title

See merge request gitlab-org/gitlab-ce!27139

Remove unused CSS class in Related MRs widget

Closes gitlab-ee#10962

See merge request gitlab-org/gitlab-ce!27150

Always show instance configuration link

Closes #59730

See merge request gitlab-org/gitlab-ce!26783

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

Stable reviewer roulette

Closes #57766

See merge request gitlab-org/gitlab-ce!27117

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

docs public key -> private key

See merge request gitlab-org/gitlab-ce!26902

Extract due quick action to shared example

Closes #59570

See merge request gitlab-org/gitlab-ce!26918

Quarantine flaky specs

See merge request gitlab-org/gitlab-ce!27170

Git push options to create a merge request, set target_branch and set merge when pipeline succeeds

Closes #53198 and #43263

See merge request gitlab-org/gitlab-ce!26752

Fix backport of project_creation_level migration

See merge request gitlab-org/gitlab-ce!27167

Fixes stylelint warnings in environments

Closes #59903

See merge request gitlab-org/gitlab-ce!27131

Related to:

- https://gitlab.com/gitlab-org/gitlab-ce/issues/60270
- https://gitlab.com/gitlab-org/gitlab-ce/issues/60271
- https://gitlab.com/gitlab-org/gitlab-ce/issues/60272
- https://gitlab.com/gitlab-org/gitlab-ce/issues/60273Signed-off-by: Rémy Coutable <remy@rymai.me>

Docs: Add examples for linking to header IDs

Closes #57191

See merge request gitlab-org/gitlab-ce!26091

Docs: Fix anchors related to issues

See merge request gitlab-org/gitlab-ce!27165

Use US English for content

See merge request gitlab-org/gitlab-ce!27154

Fix code block not rendering

See merge request gitlab-org/gitlab-ce!27153