[package] autoformat (#53783)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/53783
Use isort + black on torch/package/
Test Plan: Imported from OSS
Reviewed By: SplitInfinity
Differential Revision: D26969020
Pulled By: suo
fbshipit-source-id: e2c0738e79bf41b6342355eb7025998178c35dc9
