**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**
With the new modals API introduced in D10228 we need to move + lift the logic for the send friend request button to the `AddUsersListModal` so that we can pass it in as the `primaryButton` prop
For context here is what the action button container for the add users modal should look like (subsequent diffs will handle more updates to the UI):
{F1071516}