You know how everyone is talking about how “The Holdovers” is going to be an Oscars frontrunner? That’s a film about a student who has to stay at his prep school over the Christmas holiday, discovering more about himself and bonding with the people around him. Well, Shudder has “The Sacrifice Game,” which shares the same basic premise of “The Holdovers” but decides to throw in a murderous cult for good measure.