[JIT] enable NNC cpu fusion with torch.jit.fuser("fuser1") (#74078)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/74078
torch.jit.fuser("fuser1") is supposed to enable NNC fusion, but it currently only enables gpu fusion. This will enable CPU fusion as well.
Test Plan: Imported from OSS
Reviewed By: huiguoo
Differential Revision: D34808602
Pulled By: davidberard98
fbshipit-source-id: 2ba26220eb5dbd15c17e57274686961f3bbf46fd
(cherry picked from commit c2aa8c187d081f6033e937dd4c2bd579f251b5a0)
