In https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/19625 some
changes were introduced that do not meet our abstraction reuse rules.
This commit cleans up some of these changes so the requirements are met.

Most notably, sorting of the runners in Admin::RunnersFinder has been
delegated to Ci::Runner.order_by, similar to how we order data in
models that include the Sortable module. If we need more sort orders in
the future we can include Sortable and have Ci::Runner.order_by call
`super` to delegate to Sortable.order_by.

docs/ Grammatical Fix workflow.md

See merge request gitlab-org/gitlab-ce!21655

More specificity and clarity for iid field in API documentation.

Closes gitlab-ee#7019

See merge request gitlab-org/gitlab-ce!21490

Resolve "Add functionality to change what email address online actions commit using"

Closes #23986

See merge request gitlab-org/gitlab-ce!21598

Correct a typo in the User Status API docs

See merge request gitlab-org/gitlab-ce!21729

Resolve "Remove images from todos"

Closes #31887

See merge request gitlab-org/gitlab-ce!21704

Revert "Merge branch 'dz-add-project-id-to-jupyter' into 'master'"

See merge request gitlab-org/gitlab-ce!21722

Feature: State filter for admin runners view

See merge request gitlab-org/gitlab-ce!19625

Filter group milestones based on user membership.

See merge request gitlab-org/gitlab-ce!21660

Create specs for diffs/components/app and update modules to export factory functions

Closes #49329

See merge request gitlab-org/gitlab-ce!21685

Enable frozen string in app/graphql + app/finders

See merge request gitlab-org/gitlab-ce!21681

Update Gitlay server version to 0.121.0

See merge request gitlab-org/gitlab-ce!21725

Fixed resolved discussions not toggling expanded on changes tab

Closes #51370

See merge request gitlab-org/gitlab-ce!21676

Fix column differences in `db/schema.rb`

See merge request gitlab-org/gitlab-ce!21718

This reverts merge request !21341

Add project to jupyter cluster app factory spec

See merge request gitlab-org/gitlab-ce!21717

Document abstraction levels and code reuse

See merge request gitlab-org/gitlab-ce!21254

By default, we now strip images in the 'first_line_in_markdown'
method.  This keeps images from being displayed in the
one-liner of both todo and project activity panels.

Although not currently used, we allow images to be preserved
with the allow_images: true options.

This is based on the discussion in
https://gitlab.com/gitlab-org/gitlab-ce/issues/49653 and the example
merge request found at
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/20908. The idea
is fairly straightforward: we define a variety of abstractions, then
state which can reuse which. This should ultimately foster _better_ code
reuse, make it easier to debug problems, and make it harder to
accidentally introduce a performance regression.

Add RuboCop cops to enforce code reusing rules

See merge request gitlab-org/gitlab-ce!21391

Enable omniauth by default

Closes #49990

See merge request gitlab-org/gitlab-ce!21700

Display click to expand on collapsed diffs

Closes #51466

See merge request gitlab-org/gitlab-ce!21716

project_custom_attributes and group_custom_attributes used datetime
instead of datetime_with_timezone column type in database schema. But
actually migration defines `t.timestamps_with_timezone`.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Merge branch '50808-choosing-initialize-repo-with-a-readme-breaks-project-created-from-template' into 'master'

Resolve "Choosing “Initialize repo with a README” breaks project created from template"

Closes #50808

See merge request gitlab-org/gitlab-ce!21646

Vendor Auto-DevOps.gitlab-ci.yml: fix where the deploy job does not wait for Deployment to complete.

Closes #50186 and charts/auto-deploy-app#6

See merge request gitlab-org/gitlab-ce!21713

Vendor Auto-DevOps.gitlab-ci.yml for refactor to create registry_login() function.

Closes #51450

See merge request gitlab-org/gitlab-ce!21714

Fix route deprecation warnings in rails 5

See merge request gitlab-org/gitlab-ce!21684

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/51370