Change the client to be used to extract responses for multiturn

Author: Nagkumar Arkalgud

sdk/evaluation/azure-ai-evaluation/azure/ai/evaluation/red_team/_utils/_rai_service_target.py

@@ -276,7 +276,7 @@ async def _poll_operation_result(
                 if not self.is_one_dp_project:
                     operation_result = self._client._client.get_operation_result(operation_id=operation_id)
                 else:
-                    operation_result = self._client._operations_client.operation_results(operation_id=operation_id)
+                    operation_result = self._client._client.operation_results(operation_id=operation_id)
 
                 # Check if we have a valid result
                 if operation_result: