[SR] Macro to clean up c10::Symbol maps in passes (#67484)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/67484
Maps from `c10::Symbol -> c10::Symbol` can be hard to parse when `fromQualString` is scattered everywhere. I've been annoyed by this issue many times when rebasing, and have even messed up `FuseListUnpack` a few times.
Introduce a macro to make it easier to see what maps to what.
Test Plan: CI
Reviewed By: hlu1
Differential Revision: D32004451
fbshipit-source-id: 1086254c8403a0880d014512c439edbefa6fa015
