[quant]Fix public bindings for DTypeWithConstraint (#90315)
Summary:
Need this to fix `test_public_bindings`.
Test Plan:
`python test/test_public_bindings.py`
Reviewers:
Subscribers:
Tasks:
Tags:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/90315
Approved by: https://github.com/HDCharles
