Marc Malkin Senior Film Awards, Events & Lifestyle EditorWelcome to the new COVID normal.About 30 minutes after Thursday night’s performance of “A Christmas Carol,” starring Bradley Whitford, Alex Newell and Kate Burton, at Los Angeles’ Ahmanson Theatre was to begin, the audience was told to go home.“The voice of God came on and said there was a case of COVID in the company so they had to cancel the show,” one theater-goer, who asked that his name not be used in this story, tells me.This person