Ensure CI pipelines and builds have the correction project associations

See merge request gitlab-org/gitlab-ee!4094

CE upstream - Monday

See merge request gitlab-org/gitlab-ee!4085

Override module to specify that we're overriding

Closes #1819

See merge request gitlab-org/gitlab-ee!3876

Docs: deprecates articles index

See merge request gitlab-org/gitlab-ee!4093

This should reduce the number of SQL queries and lookups needed to look up a
project of a build and pipeline and vice versa.

Before:

```
[1] pry(main)> Ci::Build.reflect_on_association(:project).has_inverse?
=> false
[2] pry(main)> Project.reflect_on_association(:builds).has_inverse?
=> false
[3] pry(main)> Ci::Pipeline.reflect_on_association(:project).has_inverse?
=> false
[4] pry(main)> Project.reflect_on_association(:pipelines).has_inverse?
=> :project
```

After:

```
[1] pry(main)> Ci::Build.reflect_on_association(:project).has_inverse?
=> :builds
[2] pry(main)> Project.reflect_on_association(:builds).has_inverse?
=> :project
[3] pry(main)> Ci::Pipeline.reflect_on_association(:project).has_inverse?
=> :pipelines
[4] pry(main)> Project.reflect_on_association(:pipelines).has_inverse?
=> :project
```

Improve various Geo FDW queries that need aggregate pushdown to be fast

Closes #4491

See merge request gitlab-org/gitlab-ee!4024

Use an at_exit hook to stop test gitaly

See merge request gitlab-org/gitlab-ee!4088

Docs: fix duplicate sections (CI docs)

See merge request gitlab-org/gitlab-ee!4090

Remove a changelog item that is added to CE (to prevent duplicating)

See merge request gitlab-org/gitlab-ee!4086

Docs: move article "Undo possibilities in Git" into its topic-related dir

See merge request gitlab-org/gitlab-ee!4089

Port the SAST DAST doc examples from EE to CE

See merge request gitlab-org/gitlab-ee!4052

# Conflicts:
#	app/assets/javascripts/pages/projects/edit/index.js
#	app/assets/javascripts/pages/projects/issues/form.js

[ci skip]

dynamic imports for projects:e/f/i

See merge request gitlab-org/gitlab-ee!4077

dynamic imports for projects:e/f/i

See merge request gitlab-org/gitlab-ce!16417

Resolve "Count query for issues and MRs runs twice on group index"

Closes #41546

See merge request gitlab-org/gitlab-ce!16314

[API] Fix creating issue when assignee_id is empty

Closes gitlab-ce#42025

See merge request gitlab-org/gitlab-ee!4083

CE upstream - Monday

Closes gitaly#893

See merge request gitlab-org/gitlab-ee!4079

See https://gitlab.com/gitlab-org/gitlab-ce/issues/42025

Fixing request json mime type

Closes #41598

See merge request gitlab-org/gitlab-ce!16427

Refactor dispatcher for snippets:*

See merge request gitlab-org/gitlab-ce!16390

Refactor dispatcher for snippets:* (EE Version)

See merge request gitlab-org/gitlab-ee!4037

Refactor dispatcher project mr index path (EE)

See merge request gitlab-org/gitlab-ee!4028