[skip ci] Fix get templet of benchmark (#13060)

Signed-off-by: wangting0128 <ting.wang@zilliz.com>

tests/benchmark/milvus_benchmark/runners/get.py

@@ -50,12 +50,13 @@ class GetRunner(BaseRunner):
             flush = False
         self.init_metric(self.name, collection_info, index_info, search_info=None)
         case_metrics = list()
+        case_params = list()
         for ids_length in ids_length_list:
             ids = get_ids(ids_length, collection_size)
             case_metric = copy.deepcopy(self.metric)
             # set metric type as case
             case_metric.set_case_metric_type()
-            case_params = list()
+            # case_params = list()
             case_metric.run_params = {"ids_length": ids_length}
             case_metrics.append(case_metric)
             case_param = {