Move nn.module state dict pre hook (#98964)
Some modules like lazyModule may override '_save_to_state_dict()', in this case, pre_state_dict hook will not be called. So move the pre_state_dict hook out from '_save_to_state_dict()' to make sure the pre hook could be called
Pull Request resolved: https://github.com/pytorch/pytorch/pull/98964
Approved by: https://github.com/albanD
