[Quant] Support lowering of channel shuffle in FX (#83731)
## Description
Support lowering of channel shuffle in FX by adding its module and functional op to `is_copy_node` list in `torch/ao/quantization/fx/_lower_to_native_backend.py`
## Validation
UTs added to test
- correctness of quantized `ChannelShuffle` module.
- FX lowering of `ChannelShuffle` module and functional `channel_shuffle`.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/83731
Approved by: https://github.com/jerryzh168
