As the clock wound down on the year’s second overtime legislative session, Lt. Gov. Dan Patrick, the powerful leader of the Texas Senate, took a few minutes to say goodbye to his right-hand man, Sen. Brandon Creighton: The architect of a recent bevy of laws reshaping higher education in Texas — from the ban on diversity, equity and inclusion programs to limits on protests and faculty’s influence on campuses — was stepping down to take a new job overseeing those very changes.