[NNC] Use index for stride mapping in kernel.cpp (#72266)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/72266
Within the kernel, we may manipulate `Value *` in `OptimizeCat`, which would invalidate the input `Value *` -> Stride mapping.
Fix for https://github.com/pytorch/pytorch/issues/72173
Test Plan: Imported from OSS
Reviewed By: dagitses, davidberard98
Differential Revision: D33986306
Pulled By: eellison
fbshipit-source-id: dc33cd2b545e49e90d1e46b9fcf1e6dbb4b829db
(cherry picked from commit 5e4555968a0d7b9e42ab6368575137b1c1db814f)
