Run __setstate__ when cloning modules (#45858)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/45858
When cloning a module that has __setstate__, __getstate__ methods.
We need to load these methods to initialize these modules.
Test Plan: Imported from OSS
Reviewed By: suo
Differential Revision: D24116524
Pulled By: bzinodev
fbshipit-source-id: a5111638e2dc903781f6468838c000850d1f9a74
