Chris Pratt and Mike Mitchell of Quincy fight aliens in “Tomorrow War”

Portraying an overzealous Patriots fan facing Tom Brady in a 2012 “Funny or Die” video was a career highlight for Quincy actor Mike Mitchell. But as coach Bill Belichick would say, he’s on “Tomorrow”. Mitchell, a 2001 graduate of North Quincy High, co-starred with Chris Pratt in the alien invasion thriller, “The Tomorrow War,” released …