[skip ci] Modify auto-merge case to L2 and increase timeout (#12683)

Signed-off-by: NThreadDao <yufen.zong@zilliz.com>

tests/python_client/testcases/test_compaction.py

@@ -722,7 +722,7 @@ class TestCompactionOperation(TestcaseBase):
         assert tmp_nb in search_res[0].ids
         assert len(search_res[0]) == ct.default_limit
 
-    @pytest.mark.tags(CaseLabel.L1)
+    @pytest.mark.tags(CaseLabel.L2)
     def test_compact_threshold_auto_merge(self):
         """
         target: test num (segment_size < 1/2Max) reaches auto-merge threshold 10
@@ -737,7 +737,7 @@ class TestCompactionOperation(TestcaseBase):
         collection_w = self.collection_insert_multi_segments_one_shard(prefix, num_of_segment=threshold)
 
         # Estimated auto-merging takes 30s
-        cost = 30
+        cost = 60
         collection_w.load()
         start = time()
         while True:
@@ -749,7 +749,7 @@ class TestCompactionOperation(TestcaseBase):
                 break
             end = time()
             if end - start > cost:
-                raise BaseException(1, "Ccompact auto-merge more than 30s")
+                raise BaseException(1, "Ccompact auto-merge more than 60s")
 
     @pytest.mark.tags(CaseLabel.L2)
     def test_compact_less_threshold_no_merge(self):