[quant][pt2e] Add support for channel in DerivedQuantizationSpec (#107833)
Summary:
att
Test Plan:
python test/test_quantization.py TestQuantizePT2E.test_derived_qspec_per_channel
Reviewers:
Subscribers:
Tasks:
Tags:
Differential Revision: [D48630535](https://our.internmc.facebook.com/intern/diff/D48630535)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/107833
Approved by: https://github.com/andrewor14
