On the night of May 20, I stood in my tuxedo inside the storied Auditorium Louis Lumière at Cannes and listened as more than 2,000 people in black tie gave an eight-minute standing ovation for the film I wrote: The Apprentice. The movie is a Frankenstein origin story about Donald Trump, played by Marvel star Sebastian Stan in heavy prosthetics and a golden toupee. It follows Trump as he rises in Manhattan real estate during the gritty 1970s and gaudy ’80s under the tutelage of right-wing…