[Yet Another Reland] Include AT_PARALLEL_OPENMP/AT_PARALLEL_NATIVE/AT_PARALLEL_NATIVE_TBB to ATen/Config.h (#40045)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/40045
Fixes #39471
Reland of #39612 and #39881
Test Plan: Imported from OSS
Differential Revision: D22050656
Pulled By: pbelevich
fbshipit-source-id: 274bc0733c37ef6c87deb3344bb49ca9107e257b
