R1:46d1596bf797

Pull legacy revision query status filters out of the main Query class

Summary:
Ref T2543. Currently, Differential uses a set of hard-coded query filters (like "open" and "closed") to query revisions by status (for example, "open" means any of "review, revision, changes planned, accepted [usually]").

In other applications, like Maniphest, we've replaced this with a low level list of the actual statuses, plus higher level convenience UI through tokenizer functions. This basically has all of the benefits of…