[ML] New names for the default inference endpoints (#115395)

The new names are .elser-2-elasticsearch and .multilingual-e5-small-elasticsearch

Author: davidkyle

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/elasticsearch/ElasticsearchInternalService.java

@@ -85,8 +85,8 @@ public class ElasticsearchInternalService extends BaseElasticsearchInternalServi
     );
 
     public static final int EMBEDDING_MAX_BATCH_SIZE = 10;
-    public static final String DEFAULT_ELSER_ID = ".elser-2";
-    public static final String DEFAULT_E5_ID = ".multi-e5-small";
+    public static final String DEFAULT_ELSER_ID = ".elser-2-elasticsearch";
+    public static final String DEFAULT_E5_ID = ".multilingual-e5-small-elasticsearch";
 
     private static final Logger logger = LogManager.getLogger(ElasticsearchInternalService.class);
     private static final DeprecationLogger DEPRECATION_LOGGER = DeprecationLogger.getLogger(ElasticsearchInternalService.class);

x-pack/plugin/inference/src/test/java/org/elasticsearch/xpack/inference/services/elasticsearch/ElasticsearchInternalServiceTests.java

@@ -1561,8 +1561,8 @@ public void testEmbeddingTypeFromTaskTypeAndSettings() {
 
     public void testIsDefaultId() {
         var service = createService(mock(Client.class));
-        assertTrue(service.isDefaultId(".elser-2"));
-        assertTrue(service.isDefaultId(".multi-e5-small"));
+        assertTrue(service.isDefaultId(".elser-2-elasticsearch"));
+        assertTrue(service.isDefaultId(".multilingual-e5-small-elasticsearch"));
         assertFalse(service.isDefaultId("foo"));
     }