[quant][be] Replace QConfigDynamic with QConfig in code (#69864)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69864
att, will have a follow up PR that removes QConfigDynamic in the api
Test Plan:
regression tests
```
python test/test_quantization.py TestPostTrainingStatic
python test/test_quantization.py TestPostTrainingDynamic
python test/test_quantization.py TestQuantizeFx
```
Imported from OSS
Reviewed By: vkuzo
Differential Revision: D33073235
fbshipit-source-id: 6c1a1647032453803c55cdad7c04154502f085db
