pytorch

eee9ad0f - [TensorExpr] Add a skeleton for a registry of NNC lowerings. (#65550)

[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