ml/rag: enforce running etcd in milvus itests in standalone mode

Author: mohamedawnallah

sdks/python/apache_beam/ml/rag/enrichment/milvus_search_it_test.py

@@ -455,6 +455,13 @@ def create_user_yaml(service_port: int, max_vector_field_num=5):
       user_config = {
           'proxy': {
               'maxVectorFieldNum': max_vector_field_num, 'port': service_port
+          },
+          'etcd': {
+              'use': {
+                  'embed': True
+              }, 'data': {
+                  'dir': '/var/lib/milvus/etcd'
+              }
           }
       }
 
@@ -481,10 +488,11 @@ class TestMilvusSearchEnrichment(unittest.TestCase):
   """Tests for search functionality across all search strategies"""
 
   _db: MilvusDBContainerInfo
+  _version = "milvusdb/milvus:v2.5.10"
 
   @classmethod
   def setUpClass(cls):
-    cls._db = MilvusEnrichmentTestHelper.start_db_container()
+    cls._db = MilvusEnrichmentTestHelper.start_db_container(cls._version)
     cls._connection_params = MilvusConnectionParameters(
         uri=cls._db.uri,
         user=cls._db.user,