[nnc] Enable CPU fusion inside Facebook, take 3 (#59253)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/59253
Fixed a miscompilation exposed by multithreaded profiling collection; let's try again.
ghstack-source-id: 130286580
Test Plan: servicelab
Reviewed By: navahgar, huiguoo
Differential Revision: D28800692
fbshipit-source-id: d791c3b2ccd75fe5e6eca0859083d4cd67460147
