Merge branch 'kingjan1999/329978-assign-unassign-reviewer-same-time' into 'master'

Allow reviewer unassign via quick action at MR creation

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/166379



Merged-by: John Mason <9717668-johnmason@users.noreply.gitlab.com>
Approved-by: John Mason <9717668-johnmason@users.noreply.gitlab.com>
Reviewed-by: Jan Beckmann <king-jan1999@hotmail.de>
Reviewed-by: Gary Holtz <gholtz@gitlab.com>
Co-authored-by: Jan Beckmann <king-jan1999@hotmail.de>