[ao_migration] torch/nn/quantized: torch.quantization -> torch.ao.quantization (#65900)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/65900
This changes the imports in the `caffe2/torch/nn/quantized` to include the new import locations.
```
codemod -d torch/nn/quantized --extensions py 'torch.quantization' 'torch.ao.quantization'
```
Test Plan: `python test/run_test.py`
Reviewed By: jerryzh168
Differential Revision: D31301193
fbshipit-source-id: 58efb1ad51a8b441e2a3bd5b91af11eab6b9331f