pytorch quantization ao migration phase 2: caffe2/benchmark (#65833)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/65833
Renames `torch.quantization` to `torch.ao.quantization` in `caffe2/benchmarks`
folder.
```
find caffe2/benchmarks/ -type f -name "*.py" -print0 | xargs -0 sed -i "s/torch\.quantization/torch.ao.quantization/g"
```
Test Plan: CI
Reviewed By: z-a-f
Differential Revision: D31275963
fbshipit-source-id: 8596bf28df5c3ad2c4490ac8abb285d6517c0116
