[pytorch] optional zero points on dequantize per channel (#121724)
Summary:
X-link: https://github.com/pytorch/executorch/pull/2364
bypass-github-export-checks
Test Plan: sandcastle
Reviewed By: mikekgfb
Differential Revision: D54709217
Pull Request resolved: https://github.com/pytorch/pytorch/pull/121724
Approved by: https://github.com/mikekgfb
