Paginate environments bundle

Closes #25499

See merge request !9302

Fix error in MR widget after /merge slash command

Closes #28176

See merge request !9259

Do not use single quote in headings as it breaks docs.gitlab.com

Closes #25539

See merge request !9307

[ci skip]

Update services templates docs

Closes gitlab-ee#1361

See merge request !9305

[ci skip]

Integrate with new environments API

See merge request !8954

Add pagination to environments table

See merge request !9090

Merge branch 'fe-paginated-environments-api-add-subview' into 'fe-paginated-environments-api-add-pagination'

Adds sub view to list environments under a folder

See merge request !9169

Reduce query count for snippet search

See merge request !9254

Merge branch 'fe-paginated-environments-api-add-pagination' into fe-paginated-environments-api-add-subview

* fe-paginated-environments-api-add-pagination:
  Changes after review
  Rename storePagination to setPagination

Merge branch '27873-when-a-commit-appears-in-several-projects-commit-comments-are-shared-across-projects' into 'master'

Ensure only commit comments relevant to target project are returned

Closes #27873

See merge request !9264

update issue count when closing/reopening an issue

Closes #27452

See merge request !9216

Show merge errors in merge request widget

Closes #28124 and gitlab-ee#1652

See merge request !9229

Set `Auto-Submitted: auto-generated` header to emails

Closes #20305

See merge request !9163

There were two problems here:

1. On the JS side, the reference to $widgetBody didn't refer to the
   right DOM element any more. This might be because it was replaced by
   the `getMergeStatus` method. Even if it wasn't, ensuring we have the
   right element means that the content gets updated.

2. On the Ruby side, the `log_merge_error` method didn't update the
   `merge_error` column of the merge request. Change that to update if
   requested, and update in the most common cases by default.

   Additionally, this would sometimes return an error hash, but it
   doesn't look like this was ever used (the return value of
   `MergeService#execute` appears to be unused everywhere).

Clarify that stage is needed to stop environments

Closes #28110

See merge request !9296

[ci skip]

Recudes the number of queries within the snippet search from approx. 50
to approx. 14 by preloading the authors

Part of #27392

Fix broken link in university docs

See merge request !9295

[ci skip]

Make Karma output look nicer for CI

See merge request !9165

Clean up terms used for issues. Use New instead of Add.

See merge request !9281

style links on system notes to look clickable

Closes #27959

See merge request !9251

Moves check for latest key to store instead of poluting the view making it reusable between endpoints.