Follow-up from "Allow to use cross project pipelines" ver 2

Closes #35282, gitlab-ee#2604, and #35584

See merge request !13102

Use `:empty_project` where possible in feature specs

See merge request !13118

Remove Mattermost team with GitLab group

Closes #30023

See merge request !11362

Global nav (9.0) UI improvement

Closes #34921

See merge request !12772

Support the fact that Gitaly uses bundler

See merge request !13135

[Backport from EE] Refactors GitPushService spec code

See merge request !13148

Backport some recent changes related to LDAP from EE

See merge request !13119

This reverts commit 5ec3b63bfc6f341df040ae08be4858c7181bcacf.

Add remote IP, user ID and username to JSON lograge output

See merge request !13147

Add top-level /merge_requests API endpoint

Closes #28422

See merge request !13060

Resolve "Transform user profile javascript into async bundle"

Closes #35224

See merge request !12929

# Conflicts:
#   config/initializers/lograge.rb

Fix lograge exclusion in params section

See merge request !13146

Display specific error message when JIRA test fails

Closes #32483

See merge request !13100

Merge branch '35667-indicate-type-of-metric-for-prometheus-web-application-monitoring' into 'master'

Indicate type of metric for Prometheus web application monitoring

Closes #35667

See merge request !13142

When destroying a group, now an API call is made to the Mattermost
server to request the deletion of the project. Actual team deletion on
the Mattermost side happens async, so the runtime shouldn't increase by
more than a second.

Fix Prometheus docs to indicate Kubernetes is not required - docs

Closes #35657

See merge request !13140

[ci-skip]