[quant][graph] Update quantize_dynamic_script API to take sample model args (#36817)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/36817
For dynamic quant we need to run the observers on the weights to calculate the qparams before calling convert on the model.
The API requires the user to provide dummy inputs that will be fed to the model after the prepare step to run the observers
Test Plan:
test_quanitze_script.py
test_quantization.py
Imported from OSS
Differential Revision: D21134439
fbshipit-source-id: 8acaab4eb57aadb68a2a02cc470bb042c07e1f6b
