[FreestylerEval] Use current_message for request input

After changing the request shape we send, we needed to update
eval UI to use the new structure.

Bug: none
Change-Id: Ie19fa03d9ec521a36de18cfb1643c0b8166bf27e
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6063637
Commit-Queue: Alex Rudenko <[email protected]>
Reviewed-by: Alex Rudenko <[email protected]>
Auto-Submit: Ergün Erdoğmuş <[email protected]>
Commit-Queue: Ergün Erdoğmuş <[email protected]>

Author: ergunsh

scripts/freestyler/eval/index.js

@@ -155,7 +155,7 @@ const API = {
     const examplesMap = {};
     for (const example of examples) {
       const exampleId = example.exampleId;
-      const request = example.request.input;
+      const request = example.request.input || example.request.current_message.parts[0].text;
       const response = example.response;
       if (!examplesMap[exampleId]) {
         examplesMap[exampleId] = [];