Revert "[quant][ao_migration] `torch.nn.quantized.dynamic` → `torch.ao.nn.quantized.dynamic` (#78714)"
This reverts commit e6fb97d8ae0d2a45e26c9a597426f1ded13d3aec.
Reverted https://github.com/pytorch/pytorch/pull/78714 on behalf of https://github.com/janeyx99 due to sorry, reverting so https://github.com/pytorch/pytorch/pull/78713 could be cleanly reverted
