Dialect agnostic CSE Pass (#81530)
Fixes comments in https://github.com/pytorch/pytorch/pull/81512
- banned ops is an input to the pass
- update the fx/readme.md to include this file for better discoverability
- use make_fx in torch repo
Pull Request resolved: https://github.com/pytorch/pytorch/pull/81530
Approved by: https://github.com/SherlockNoMad
