Remap Experimental Setting
Remap Experimental Setting

Summary: - move side-effects of `MVFST_EXPERIMENTAL3` to `MVFST_EXPERIMENTAL2`

Reviewed By: mjoras

Differential Revision: D37011661

fbshipit-source-id: b33901c0536aa5cc199ca5064894e7cf3d6bc686

facebookincubator/mvfst,facebookincubator/mvfst,facebookincubator/mvfst,facebookincubator/mvfst,facebookincubator/mvfst