[skip e2e]Change Milvus log level to debug for chaos test (#21960)

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

tests/python_client/chaos/cluster-values.yaml

 cluster:
   enabled: true
+log:
+  level: debug
 image:
   all:
     repository: milvusdb/milvus

tests/python_client/chaos/standalone-values.yaml

 cluster:
   enabled: false
+
+log:
+  level: debug
+
 image:
   all:
     repository: milvusdb/milvus