Migrate from Folly Format to fmt
Migrate from Folly Format to fmt

Summary: Migrate from Folly Format to fmt which provides smaller compile times and per-call binary code size.

Reviewed By: alandau

Differential Revision: D14954926

fbshipit-source-id: 9d2c39e74a5d11e0f90c8ad0d71b79424c56747f

facebook/folly,facebook/folly,facebook/folly,facebook/folly,facebook/folly