Of the many twists and surprises in Jacques Audiard’s audacious musical “Emilia Pérez,” the most startling comes during the film‘s end credits, when one realizes that breakout performer Karla Sofía Gascón stars as the eponymous Emilia both pre- and post-gender-affirming surgery. Of course she’s the stunning Emilia, but she also plays evil cartel leader Manitas. […]