At present rte_graph_destroy will only clean up the struct rte_node and struct graph_node,
not the struct node, rte_node_clone creates the struct node, inserts the global node_list linked list, there is no function to clean up the node_list linked list, if you want to clean up the node created by rte_node_clone, Perhaps a new function needs to be added to clean up node_list linked lists. Or write a test case function to clean up the nodes that are cloned by this test case.
