The high school seniors might have thought Steve Carell was doing a bit. The A-list actor showed up on a screen at six high school assemblies in Altadena, Calif., on Tuesday and told the students - many of whom lost their homes in the Eaton Fire - that their prom tickets were paid for.Subscribe to The Post Most newsletter for the most important and interesting stories from The Washington Post. “Attention. Attention all seniors,” Carell said in the selfie-style video message, which he delivered i