[quant][fx] Add _convert_to_reference_decomposed (#87094)
Summary:
_convert_to_reference_decomposed is a private convert function in fx graph mode quantization flow to convert
a calibrated/trained model to a reference quantized model with decomposed quantized tensor representations.
Test Plan:
python test/test_quantization.py TestQuantizeFx.test__convert_to_reference_decomposed_fx
Reviewers:
Subscribers:
Tasks:
Tags:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87094
Approved by: https://github.com/andrewor14
