[reland][quant] Explictly set default quantized engine instead of relying on the order of supported_qengines (#89804) (#90036)
Summary:
Fixes: https://github.com/pytorch/pytorch/issues/86404
Test Plan:
ossci + sandcastle
Reviewers:
Subscribers:
Tasks:
Tags:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/90036
Approved by: https://github.com/andrewor14