[TensorExpr] Add a skeleton for a registry of NNC lowerings. (#65550)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/65550
This PR adds the source files and the class for the registry, subsequent
PRs actually port existing lowerings to this mechanism.
Test Plan: Imported from OSS
Reviewed By: albanD
Differential Revision: D31148922
Pulled By: ZolotukhinM
fbshipit-source-id: 4c087b22ee898d5a5a18a5d2a4bb795aa2ffd655
Author
Mikhail Zolotukhin
