[skip ci]New property get node by node type (#8730)

Signed-off-by: yanliang567 <yanliang.qiao@zilliz.com>

tests/python_client/common/milvus_sys.py

@@ -72,3 +72,7 @@ class MilvusSys:
     def nodes(self):
         """get all the nodes in Milvus deployment"""
         return json.loads(self.sys_info.response).get('nodes_info')
+
+    @property
+    def get_nodes_by_type(self, node_type=None):
+        return NotImplementedError