feat:Add tool_responses to IntermediateData

PiperOrigin-RevId: 800600571

Author: jinning-li

src/google/adk/evaluation/eval_case.py

@@ -37,6 +37,9 @@ class IntermediateData(EvalBaseModel):
   tool_uses: list[genai_types.FunctionCall] = []
   """Tool use trajectory in chronological order."""
 
+  tool_responses: list[genai_types.FunctionResponse] = []
+  """Tool response trajectory in chronological order."""
+
   intermediate_responses: list[tuple[str, list[genai_types.Part]]] = []
   """Intermediate responses generated by sub-agents to convey progress or status
   in a multi-agent system, distinct from the final response.