deprecated function based API (#18444)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18444
This adds the deprecated function based API to c10::RegisterOperators().
This is the API currently exposed under jit::RegisterOperators() and we need to support it for backwards compatibility.
Reviewed By: dzhulgakov
Differential Revision: D14514218
fbshipit-source-id: c77676851cfd431d66f18fd8038cf153a3a7d7cc
