Meredith Woerner Deputy Editor, Variety.comFor once, Ben Affleck gets to ask the questions.That’s how the actor-director framed his duty of leading a conversation with longtime friend and “Gone Girl” boss David Fincher, the esteemed director whose Netflix film “Mank” has emerged as a top awards contender for 2021.“This is a real role reversal from having to just be Fincher bitch, having to go over and over again,” Affleck teased the director, alluding to Fincher’s notorious preference for many