CE upstream: Friday

Closes gitlab-ce#36919

See merge request !2765

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

Limit Geo LogCursor spec to run only on PostgreSQL

See merge request !2772

Remove duplicated items from admin sidebar

Closes #3260

See merge request !2769

Add a bunch of missing properties to the settings API documentation

See merge request !2753

re-add missing css class in admin sidebar template

See merge request !2759

Docs: update links guideline to inline links

See merge request !2716

Update project_services.md

Closes #3253

See merge request !2767

EE-Port: Handle creating a nested group on MySQL correctly

See merge request !2766

Add a health check for the state of Geo replication lag in secondary

Closes #1929

See merge request !1610

Note about duplicating repository config on secondary.

See merge request !2764

Use proper logging for artifacts rake task

See merge request !2762

See
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/13739

Fix approvals before merge error while importing projects

Closes #2617

See merge request !2763

Since we don't support nested groups on MySQL, raise an error
explaining that on import instead of trying anyway.

* upstream/master: (39 commits)
  Fix searching for files by path
  Fix invite by email address duplication
  Revert "Merge branch 'mk-reenable-mysql-tests-on-all-branches' into 'master'"
  Revert "Merge branch 'sh-sidekiq-backtrace' into 'master'"
  Add missing third argument to `Git::Repository#initialize` in spec
  New doc: how to install GitLab on Azure
  Enable 5 lines of Sidekiq backtrace lines to aid in debugging
  Reenable MySQL tests on all branches
  Add `:nested_groups` metadata to `Groups::NestedCreateService` specs
  Re-allow appearances.description_html to be NULL
  Remove leftover API helper for removed CI API
  Define ldap methods at runtime
  Changed all font-weight values to 400 and 600
  Use gitaly-proto 0.31.0
  Avoid committer = lines
  Reword job to pipeline on the chart view
  Remove underscore-rails gem
  Hide group title on sidebar collapse; use more generic class for titles
  Add tests for Committer#==
  Added repo_service_spec for commitFlash and corrected repo_commit-Secion api spec
  ...

Fix searching for files by path

Closes #36939

See merge request !13798

Using logging we get a known structure, and the time of the message.
Last change removed the unused `order` statement. This is not used
because `find_each` uses the primary key anyway.

Remove leftover API helper for removed CI API

See merge request !13804

Re-allow appearances.description_html to be NULL

Closes #36919

See merge request !13806

Set a default CI/CD status when it is not known

Closes #36790

See merge request !13737

Fix invite by email address duplication

Closes #36937

See merge request !13826

Use gitaly-proto 0.31.0

See merge request !13795

Add event metrics to mirrors and remote mirrors.

See merge request !2744

Reword job to pipeline on the chart view

Closes #36928

See merge request !13786

This reverts merge request !13812

Reenable MySQL tests on all CE and EE branches

Closes #36384

See merge request !13812