Update chaos cron (#7652)

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

tests/python_client/chaos/chaos_objects/chaos_pulsar_podkill.yaml

@@ -14,4 +14,4 @@ spec:
       app.kubernetes.io/name: milvus
       component: pulsar
   scheduler:
-    cron: '@every 2s'
+    cron: '@every 5s'

tests/python_client/chaos/chaos_objects/chaos_querycoord_podkill.yaml

@@ -14,4 +14,4 @@ spec:
       app.kubernetes.io/name: milvus
       component: querycoord
   scheduler:
-    cron: '@every 2s'
+    cron: '@every 5s'

tests/python_client/chaos/chaos_objects/chaos_querynode_podkill.yaml

@@ -14,4 +14,4 @@ spec:
       app.kubernetes.io/name: milvus
       component: querynode
   scheduler:
-    cron: '@every 2s'
+    cron: '@every 5s'