[Quant] Add the operator of decomposed fake quant per channel (#121297)
**Summary**
Add the operator of `quantized_decomposed.fake_quant_per_channel` and test the forward and backward of this op with comparing to ATen.
**Test Plan**
```
python -u -m pytest -s -v test_cpu_repro.py -k test_decomposed_fake_quant_per_channel
```
**Next Step**
Optimize the performance: from the generated code of forward and backward graph, the code didn't vectorize.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/121297
Approved by: https://github.com/jerryzh168, https://github.com/jgong5
