[quant][graph] Add pass to insert quant dequant for dynamic quantization (#35448)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/35448
Add _choose_qparams_per_tensor which returns scale and zero_point similar to the dynamic quantization in the operator
Test Plan:
python test/test_quantize_script.py
Imported from OSS
Differential Revision: D20755679
fbshipit-source-id: c9066d8f1bb3e331809be26c4be806faafc9b981
