Change Details

To follow the conventions of the new Modal api introduced earlier in this project, we need to lift the logic for the primary button to the same level where we render `SearchModal` so we can pass the button in as the `primaryButton` prop

**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** To follow the conventions of the new Modal api introduced earlier in this project, we need to lift the logic for the primary button to the same level where we render `SearchModal` so we can pass the button in as the `primaryButton` prop Linear task: https://linear.app/comm/issue/ENG-5976/add-members-modal-experience Depends on D10943

**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** To follow the conventions of the new Modal api introduced earlier in this project, we need to lift the logic for the primary button to the same level where we render `SearchModal` so we can pass the button in as the `primaryButton` prop Linear task: https://linear.app/comm/issue/ENG-5976/add-members-modal-experience Depends on D10943