[nnc] Enable CPU fusion inside Facebook, take 2 (#58347)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/58347
Back out "Revert D27652484 (https://github.com/pytorch/pytorch/commit/ac04cc775bc1cc7e85e7bbc8a54744720fe7c068): [nnc] Enable CPU fusion inside Facebook"
Original commit changeset: ecfef3ee1e71
ghstack-source-id: 129279584
Test Plan: Tests for bugfix included in this stack
Reviewed By: navahgar
Differential Revision: D28461013
fbshipit-source-id: 79a80b6ffb653ab952ff5efaa143d3362bb7d966
