[JIT] canonicalize aten::rsub (#65014)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/65014
ghstack-source-id: 138656948
Test Plan:
```
(pytorch) [maxren@devvm3115.atn0 ~/pytorch] python3 test/test_jit.py TestPeephole
CUDA not available, skipping tests
monkeytype is not installed. Skipping tests for Profile-Directed Typing
........s......................
----------------------------------------------------------------------
Ran 31 tests in 0.393s
OK (skipped=1)
(pytorch) [maxren@devvm3115.atn0 ~/pytorch] python3 test/test_jit.py TestPeephole.test_normalized_rsub
CUDA not available, skipping tests
monkeytype is not installed. Skipping tests for Profile-Directed Typing
.
----------------------------------------------------------------------
Ran 1 test in 0.015s
OK
```
Reviewed By: eellison
Differential Revision: D30941389
fbshipit-source-id: 03f0416d99090845c9bfb1e5fcf771d5f1d7a050
