NBC’s comedy institution “Saturday Night Live” reached its largest audience since 2011 with last weekend’s episode hosted by President Trump impersonator Alec Baldwin and featuring the return of Melissa McCarthy portraying White House press secretary Sean Spicer.The show reached 10.8 million viewers, the Nielsen company said. To put that in perspective, the late-night show had a bigger audience than all but four prime-time programs on TV last week. Among younger viewers, only the Grammys had bet