[ML] Update ELSER version for Elastic Assistant (#167522)

## Summary

Update Elastic Assistant to utilize a new version of ELSER.

### Checklist

- [ ]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios

x-pack/plugins/ml/server/mocks.ts

@@ -4,6 +4,7 @@
  * 2.0; you may not use this file except in compliance with the Elastic License
  * 2.0.
  */
+import { createTrainedModelsProviderMock } from './shared_services/providers/__mocks__/trained_models';
 import { createJobServiceProviderMock } from './shared_services/providers/__mocks__/jobs_service';
 import { createAnomalyDetectorsProviderMock } from './shared_services/providers/__mocks__/anomaly_detectors';
 import { createMockMlSystemProvider } from './shared_services/providers/__mocks__/system';
@@ -20,6 +21,7 @@ const createSetupContract = () =>
     modulesProvider: createModulesProviderMock(),
     resultsServiceProvider: createResultsServiceProviderMock(),
     alertingServiceProvider: createAlertingServiceProviderMock(),
+    trainedModelsProvider: createTrainedModelsProviderMock(),
   } as unknown as jest.Mocked<MlPluginSetup>);
 
 const createStartContract = () => jest.fn();

x-pack/plugins/ml/server/shared_services/providers/__mocks__/trained_models.ts

@@ -5,8 +5,19 @@
  * 2.0.
  */
 
+import { TrainedModels } from '../../../shared';
+
+const trainedModelsServiceMock = {
+  getTrainedModels: jest.fn().mockResolvedValue([]),
+  getTrainedModelsStats: jest.fn().mockResolvedValue([]),
+  startTrainedModelDeployment: jest.fn(),
+  stopTrainedModelDeployment: jest.fn(),
+  inferTrainedModel: jest.fn(),
+  deleteTrainedModel: jest.fn(),
+  updateTrainedModelDeployment: jest.fn(),
+  putTrainedModel: jest.fn(),
+  getELSER: jest.fn().mockResolvedValue({ name: '' }),
+} as jest.Mocked<TrainedModels>;
+
 export const createTrainedModelsProviderMock = () =>
-  jest.fn(() => ({
-    getTrainedModels: jest.fn(),
-    getTrainedModelStats: jest.fn(),
-  }));
+  jest.fn().mockReturnValue(trainedModelsServiceMock);

x-pack/plugins/ml/server/shared_services/providers/trained_models.ts

@@ -8,7 +8,7 @@
 import type * as estypes from '@elastic/elasticsearch/lib/api/typesWithBodyKey';
 import type { CloudSetup } from '@kbn/cloud-plugin/server';
 import type { KibanaRequest, SavedObjectsClientContract } from '@kbn/core/server';
-import type { GetElserOptions } from '@kbn/ml-trained-models-utils';
+import type { GetElserOptions, ModelDefinitionResponse } from '@kbn/ml-trained-models-utils';
 import type {
   MlInferTrainedModelRequest,
   MlStopTrainedModelDeploymentRequest,
@@ -47,6 +47,7 @@ export interface TrainedModelsProvider {
     putTrainedModel(
       params: estypes.MlPutTrainedModelRequest
     ): Promise<estypes.MlPutTrainedModelResponse>;
+    getELSER(params?: GetElserOptions): Promise<ModelDefinitionResponse>;
   };
 }
 
@@ -122,7 +123,7 @@ export function getTrainedModelsProvider(
               return mlClient.putTrainedModel(params);
             });
         },
-        async getELSER(params: GetElserOptions) {
+        async getELSER(params?: GetElserOptions) {
           return await guards
             .isFullLicense()
             .hasMlCapabilities(['canGetTrainedModels'])