[JIT] Refactor SR invocation of fusion (#70508)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70508
We can create the code object at compile time instead or runtime to speed it up. This also makes unnecessary the compilation cache. TODO: figure out if theres a way to cache InterpreterState object
Test Plan: Imported from OSS
Reviewed By: ngimel
Differential Revision: D33458648
Pulled By: eellison
fbshipit-source-id: 710389741e7c6210528f2f96ab496fcd533d942a
