[nnc] Add support for dynamic shapes in TensorExprKernel (#67861)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/67861
Previously submitted as https://github.com/pytorch/pytorch/pull/67197.
This got reverted because its failures were hidden by the failures of
another PR.
Test Plan: Imported from OSS
Reviewed By: ZolotukhinM
Differential Revision: D32178196
Pulled By: navahgar
fbshipit-source-id: cc8a5c68aed360d06289e69645461cfa773e1300
