“The Hunger Games: Mockingjay,” costarring Jennifer Lawrence, Liam Hemsworth and others, was released in two parts lasting four hours and 20 minutes. Harry Cohn, monstrous mogul of Columbia Pictures, knew how to tell when a movie was wearing out its welcome. “If my fanny squirms,” he announced, “it’s bad. If my fanny doesn’t squirm, it’s good.” He’d never get through a picture today. The last Bond film, “No Time to Die,” was two hours and 43 minutes long. “The Batman” was two hours and 56 minutes. And the movie version of “Wicked” … well, no one knows how long that’s going to be, yet. But if y…