[native] Move render function from Tooltip to functional component

Summary:
Move render() function to the functional compoent as a part of Tooltip migration to functional component. This finishes the migration of the Tooltip component to functional component.

Depends on D14111

Test Plan: Open up some tooltips and make sure they look correct.

Reviewers: ashoat, tomek

Reviewed By: ashoat

Differential Revision: https://phab.comm.dev/D14112