If all the world’s a stage, then actors get to live the most lives on it. Their task is to make other lives believable, to immerse the audience in their story, make them root for or against them. Although Andrew Scott is just now enjoying overdue time in the spotlight, for his triumphant turn in the Hamlet-adjacent festival film Elsinore, he’s been commanding attention for decades on stage and screen. For many in the U.S., Scott broke out opposi…