Reapply "Populate gratedGroup"

This reverts commit 4cfcf8799982046c3b65b288f78fda255ad9b60b.

apps/app/src/features/openai/server/services/openai.ts

@@ -653,7 +653,9 @@ class OpenaiService implements IOpenaiService {
           ],
         },
       ],
-    });
+    })
+      .populate('grantedGroupsForShareScope.item')
+      .populate('grantedGroupsForAccessScope.item');
 
     return {
       myAiAssistants: assistants.filter(assistant => assistant.owner.toString() === user._id.toString()) ?? [],