Make __deepcopy__ of GraphModule able to handle circular reference. (#93038)
Summary:
One of such places where circular reference can occur is: _load_state_dict_pre_hooks contains a _WrappedHook, _WrappedHook has a weakref to the same module.
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Tags:
Fixes #ISSUE_NUMBER
Pull Request resolved: https://github.com/pytorch/pytorch/pull/93038
Approved by: https://github.com/jerryzh168
