“Ain’t Too Proud: The Life and Times of The Temptations” is a seamless, slick, and exuberantly entertaining new musical that reclaims the “jukebox” genre with an energetic, fast-moving, and engrossing portrait-like study of The Temptations. This show looks good, sounds good, and feels good, and is easily one of the best catalogue musicals ever to grace The Great White Way.