Revert "[quant][ao_migration] `torch.nn.quantized.modules` → `torch.ao.nn.quantized.modules` (#78713)"
This reverts commit 432f037498e3f470f1f6d2a5cc7c6ae8eb4fc870.
Reverted https://github.com/pytorch/pytorch/pull/78713 on behalf of https://github.com/janeyx99 due to Reverting for breaking (trunk-only) ios build
