[ao][sparsity][fx] adding unit tests for sparsity+reference quant (#81994)
Summary: No functional changes here, the previous PRs handle the
necessary changes for this to work.
Test Plan: python test/test_ao_sparsity.py TestFxComposability
Reviewers:
Subscribers:
Tasks:
Tags:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/81994
Approved by: https://github.com/jerryzh168
