[PyTorch] Use plain old function pointer for RecordFunctionCallback (reapply) (#49408)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/49408
Nearly every non-test callsite doesn't need to capture any variables anyway, and this saves 48 bytes per callback.
ghstack-source-id: 118665808
Test Plan:
Wait for GitHub CI since we had C++14-specific issues with
this one in previous PR https://github.com/pytorch/pytorch/pull/48629
Reviewed By: malfet
Differential Revision: D25563207
fbshipit-source-id: 6a2831205917d465f8248ca37429ba2428d5626d
