[Pytorch][Ondevice quantization] Add device side API to convert model (#83807)
Summary:
This diff adds device side API which will convert the model to its
quantized equivalent. THe input model must have been prepared AOT for
quantization.
API is implemented by:
- Running reset obervers
- Running observe method
- Running quantize method
- And replacing method, e.g. forward, with its quantized equivalent.
Test Plan:
test/quantization/jit/test_ondevice_quantization.py
Reviewers:
Subscribers:
Tasks:
Tags:
Differential Revision: [D38889818](https://our.internmc.facebook.com/intern/diff/D38889818)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/83807
Approved by: https://github.com/iseeyuan
