With a staggering loss rate of 77%, “The Bloody 100th” Bomb Group required 25 missions from its crewmen before they could return home from the horrors of World War II. “It’s an insane statistic,” says Callum Turner about the number of men sacrificed. He plays Maj. John “Bucky” Egan in Apple TV+’s “Masters of the Air,” an epic nine-part limited …