The Air Force has had cameos in the films like ‘Godzilla,’ ‘Iron Man,’ and an episode or two of ‘Homeland.’ But in ‘Good Kill,’ audiences can zero-in on the drone pilot realm where war becomes an arbitrary arena. Not before long, U.S. Air Force pilot-turned-drone operator Tom Egan (Ethan Hawke) questions if his ground-based cockpit missions (as one drone pilot calls it “warheads on foreheads”) are too much to handle. Hawke’s character — logging 3,000 hours in F-16s, six tours and 200 combat sorties — at some point decides that returning to the front lines would be better than his…