The “Marty Supreme” question that got old in about five minutes — was the title character likable enough? —shouldn’t even be allowed in the same room with Rose Byrne . From the annoyingly upscale “perfect” boss’s wife in “Bridesmaids” to the miserable mother who becomes cosmically unglued in “If I Had Legs I’d Kick You,” she has made a career of playing characters who are haughty and testy, glamorously difficult and hard to cozy up to. But that’s part of her pizazz as an actor. Who would want