[skip e2e]Update chaos yaml for pod failure (#13997)

Signed-off-by: Nzhuwenxing <wenxing.zhu@zilliz.com>

tests/python_client/chaos/chaos_objects/pod_failure/chaos_datanode_pod_failure.yaml

@@ -10,7 +10,8 @@ spec:
     labelSelectors:
       app.kubernetes.io/instance: milvus-chaos
       component: datanode
-  mode: one
+  mode: fixed
+  value: "1"
   action: pod-failure
   duration: 2m
   gracePeriod: 0

tests/python_client/chaos/chaos_objects/pod_failure/chaos_indexnode_pod_failure.yaml

@@ -10,7 +10,8 @@ spec:
     labelSelectors:
       app.kubernetes.io/instance: milvus-chaos
       component: indexnode
-  mode: one
+  mode: fixed
+  value: "1"
   action: pod-failure
   duration: 2m
   gracePeriod: 0

tests/python_client/chaos/chaos_objects/pod_failure/chaos_proxy_pod_failure.yaml

@@ -10,7 +10,8 @@ spec:
     labelSelectors:
       app.kubernetes.io/instance: milvus-chaos
       component: proxy
-  mode: one
+  mode: fixed
+  value: "1"
   action: pod-failure
   duration: 2m
   gracePeriod: 0
\ No newline at end of file

tests/python_client/chaos/chaos_objects/pod_failure/chaos_querynode_pod_failure.yaml

@@ -10,7 +10,8 @@ spec:
     labelSelectors:
       app.kubernetes.io/instance: milvus-chaos
       component: querynode
-  mode: one
+  mode: fixed
+  value: "1"
   action: pod-failure
   duration: 2m
   gracePeriod: 0
\ No newline at end of file