Apply #51066 to backport

Author: pheyos

x-pack/test/functional/services/transform_ui/api.ts

@@ -8,7 +8,7 @@ import expect from '@kbn/expect';
 import { FtrProviderContext } from '../../ftr_provider_context';
 
 export function TransformAPIProvider({ getService }: FtrProviderContext) {
-  const es = getService('es');
+  const es = getService('legacyEs');
   const log = getService('log');
   const retry = getService('retry');