[quant][tests] Enable tests to run on all qengine backends (#37843)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37843
Refactor tests to use supported_qengines
Test Plan:
python test/test_quantization.py
Imported from OSS
Differential Revision: D21409626
fbshipit-source-id: 21b23e498f4359c7ea7430c86f931dd534ddfdb7
