Revert "Revert D19975411: Remove special case codegen for tril_indices/triu_indices." (#33572)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/33572
This reverts commit 687a7e4a2566861c53c8fb53a80b198465168b38.
Original PR #33305
Reland with BC tests whitelisted. See https://github.com/pytorch/pytorch/issues/33580 for reasoning why this change is not actually BC breaking.
Test Plan: Imported from OSS
Differential Revision: D20011011
Pulled By: ezyang
fbshipit-source-id: 116374efc93af12b8ad738a0989d6f0daa9569e2
