[Inference] Replace transport request calls with inference.get (#210396)

## Summary

Replaces transport request calls with `inference.get` elasticsearch
client method.

### Checklist

- [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/platform/plugins/shared/index_management/server/routes/api/inference_models/register_get_route.ts

@@ -5,7 +5,6 @@
  * 2.0.
  */
 
-import { InferenceAPIConfigResponse } from '@kbn/ml-trained-models-utils';
 import { addBasePath } from '..';
 import { RouteDependencies } from '../../../types';
 
@@ -25,13 +24,9 @@ export function registerGetAllRoute({ router, lib: { handleEsError } }: RouteDep
     async (context, request, response) => {
       const { client } = (await context.core).elasticsearch;
 
-      // TODO: Use the client's built-in function rather than the transport when it's available
       try {
-        const { endpoints } = await client.asCurrentUser.transport.request<{
-          endpoints: InferenceAPIConfigResponse[];
-        }>({
-          method: 'GET',
-          path: `/_inference/_all`,
+        const { endpoints } = await client.asCurrentUser.inference.get({
+          inference_id: '_all',
         });
 
         return response.ok({

x-pack/platform/plugins/shared/ml/server/routes/inference_models.ts

@@ -10,7 +10,6 @@ import type {
   InferenceInferenceEndpoint,
   InferenceTaskType,
 } from '@elastic/elasticsearch/lib/api/types';
-import type { InferenceAPIConfigResponse } from '@kbn/ml-trained-models-utils';
 import type { RouteInitialization } from '../types';
 import { createInferenceSchema } from './schemas/inference_schema';
 import { modelsProvider } from '../models/model_management';
@@ -85,15 +84,12 @@ export function inferenceModelRoutes(
     .addVersion(
       {
         version: '1',
-        validate: {},
+        validate: false,
       },
       routeGuard.fullLicenseAPIGuard(async ({ client, response }) => {
         try {
-          const body = await client.asCurrentUser.transport.request<{
-            models: InferenceAPIConfigResponse[];
-          }>({
-            method: 'GET',
-            path: `/_inference/_all`,
+          const body = await client.asCurrentUser.inference.get({
+            inference_id: '_all',
           });
           return response.ok({
             body,

x-pack/solutions/search/plugins/search_inference_endpoints/server/lib/fetch_inference_endpoints.test.ts

@@ -46,14 +46,14 @@ describe('fetch indices', () => {
 
   const mockClient = {
     asCurrentUser: {
-      transport: {
-        request: jest.fn(),
+      inference: {
+        get: jest.fn(),
       },
     },
   };
 
   it('returns all inference endpoints', async () => {
-    mockClient.asCurrentUser.transport.request.mockImplementationOnce(() => {
+    mockClient.asCurrentUser.inference.get.mockImplementationOnce(() => {
       return Promise.resolve({ endpoints: mockInferenceEndpointsResponse });
     });
 

x-pack/solutions/search/plugins/search_inference_endpoints/server/lib/fetch_inference_endpoints.ts

@@ -13,14 +13,11 @@ export const fetchInferenceEndpoints = async (
 ): Promise<{
   inferenceEndpoints: InferenceAPIConfigResponse[];
 }> => {
-  const { endpoints } = await client.transport.request<{
-    endpoints: any;
-  }>({
-    method: 'GET',
-    path: `/_inference/_all`,
+  const { endpoints } = await client.inference.get({
+    inference_id: '_all',
   });
 
   return {
-    inferenceEndpoints: endpoints,
+    inferenceEndpoints: endpoints as InferenceAPIConfigResponse[],
   };
 };