Merge branch 'jliu/repository-health-endpoint' into 'master'

api: Add Repository Health API

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/182220



Merged-by: Michael Becker <mbecker@gitlab.com>
Approved-by: mo khan <mo@mokhan.ca>
Approved-by: Michael Becker <mbecker@gitlab.com>
Reviewed-by: Quang-Minh Nguyen <qmnguyen@gitlab.com>
Reviewed-by: James Liu <jliu@gitlab.com>
Reviewed-by: Michael Becker <mbecker@gitlab.com>
Reviewed-by: mo khan <mo@mokhan.ca>
Co-authored-by: James Liu <jliu@gitlab.com>