Revert "[FSDP] Do not clean FQNs even for `use_orig_params=True` (#91767)"
This reverts commit d6f3265e1add26abedb504910be93b393b9fb33c.
Reverted https://github.com/pytorch/pytorch/pull/91767 on behalf of https://github.com/malfet due to Looks like it broke `test_compatible_with_named_optimizer` distribued tests, see https://hud.pytorch.org/pytorch/pytorch/commit/d6f3265e1add26abedb504910be93b393b9fb33c
