Fix broken link in university docs

See merge request !1253

[ci skip]

Simplify GitLab Pages admin docs

See merge request !1252

[ci skip]

[ci skip]

Show merge errors in merge request widget

See merge request !1241

CE Upstream - Wednesday

Closes gitlab-ce#27925, gitlab-com/infrastructure#1139, gitlab-com/www-gitlab-com#1152, and gitlab-ce#27939

See merge request !1239

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

Update services templates docs

See merge request !1246

[ci skip]

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).

Geo: Added `gitlab:geo:check` and improved `gitlab:env:info` rake tasks

Closes #1611

See merge request !1120

Fix most of broken docs links

See merge request !1242

[ci skip]

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

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

Layout alignment fix in new project and edit project screen

See merge request !9201

Disable invalid service templates

Closes #25112

See merge request !8850

Rename builds to jobs in docs

See merge request !1240

Rename builds to jobs in docs

See merge request !9204

Fix stray pipelines API request when showing MR

Closes #27925

See merge request !9213

[ci skip]

[ci skip]

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

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

Don't ignore the parameter of MergeRequestsHelper#mr_change_branches_path

See merge request !9223

Merge branch 'approvals-spec-fix-for-816' into '8-16-stable-ee'

See merge request !1238

Nested groups improvements pt 3

See merge request !9227

Make it possible to pass coverage value to commit status API

Closes #27807

See merge request !9214

Fix approvals spec for 8-16-stable

See merge request !1231

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/27925

SidekiqStatus need to be qualified in some cases

Closes #27759

See merge request !9235

Fix z index bugs

Closes #28142

See merge request !9236