support free eager tensor in graph state dict (#9085)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

python/oneflow/nn/graph/graph.py

@@ -364,7 +364,7 @@ def state_dict(
             assert len(additional_var_names) == len(additional_var_tensors)
             for i in range(len(additional_var_names)):
                 additional_tensor = additional_var_tensors[i]
-                if not self._is_global_view:
+                if not self._is_global_view and additional_tensor.is_global:
                     additional_tensor = additional_tensor.to_local()
                 destination[additional_var_names[i]] = additional_tensor
         else: