Merge branch 'move-member-approval-to-ee' into 'master'

Move member approval model to EE

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/181312



Merged-by: Marius Bobin <mbobin@gitlab.com>
Approved-by: Suraj Tripathi <stripathi@gitlab.com>
Approved-by: Marius Bobin <mbobin@gitlab.com>
Reviewed-by: Marius Bobin <mbobin@gitlab.com>
Reviewed-by: Vitali Tatarintev <vtatarintev@gitlab.com>
Reviewed-by: Vijay Hawoldar <vhawoldar@gitlab.com>
Reviewed-by: Suraj Tripathi <stripathi@gitlab.com>
Reviewed-by: GitLab Duo <gitlab-duo@gitlab.com>
Co-authored-by: Jorge Cook <jcook@gitlab.com>