quant: add type annotations on quantization.fx.Quantizer matches (#48350)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48350
As titled, continuing to incrementally type quantization.fx.Quantizer.
Test Plan:
```
mypy torch/quantization/
python test/test_quantization.py TestQuantizeFx
```
Imported from OSS
Reviewed By: jerryzh168
Differential Revision: D25138947
fbshipit-source-id: fd19bf360077b447ce2272bfd4f6d6b798ae05ac
