PLEASE NOTE THAT THIS DIFF AND SUBSEQUENT DIFFS IN THIS STACK WILL NOT BE LANDED UNTIL MORE OF THE REDESIGN IS READY SINCE THIS WILL CAUSE REGRESSIONS IN PROD
Mostly a rename diff and minor touchups to cleanup the add members modal
Linear task: https://linear.app/comm/issue/ENG-5976/add-members-modal-experience
Depends on D10944