move quantization normalization layers to aten/src/ATen/native/quantized/cpu/ (#37352)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37352
Implementing cleanup requested on #36835.
Test Plan:
```
python test/test_quantization.py TestQuantizedOps.test_instance_norm
python test/test_quantization.py TestQuantizedOps.test_group_norm
python test/test_quantization.py TestQuantizedOps.test_qlayer_norm
```
Imported from OSS
Differential Revision: D21261139
fbshipit-source-id: bebcad62a21a082152281a50defaa82aa769935a
