[Obs AI Assistant] Awaiting elasticsearch response (elastic#187170)

The assistant is not able to retrieve information from `elasticsearch`
function


https://github.com/elastic/kibana/assets/1313018/c5ba41bd-3c24-4390-a9f6-f1bde0640b4c

After awaiting the response the assistant is sucessfully returning the
information


https://github.com/elastic/kibana/assets/1313018/bbf45e80-79a8-4bad-b248-4ef37c7317b3

x-pack/plugins/observability_solution/observability_ai_assistant/server/functions/elasticsearch.ts

@@ -39,7 +39,7 @@ export function registerElasticsearchFunction({
     },
     async ({ arguments: { method, path, body } }) => {
       const esClient = (await resources.context.core).elasticsearch.client;
-      const response = esClient.asCurrentUser.transport.request({
+      const response = await esClient.asCurrentUser.transport.request({
         method,
         path,
         body,