fix:修复不启动意图识别，functioncall依旧加载的bug (#691)

update：intent_llm意图识别获取新闻和天气过长，tts容易出错，暂时只支持简单简单工具

main/xiaozhi-server/core/handle/iotHandle.py

@@ -263,6 +263,8 @@ def register_device_type(descriptor):
 
 # 用于接受前端设备推送的搜索iot描述
 async def handleIotDescriptors(conn, descriptors):
+    if not conn.use_function_call_mode:
+        return
     wait_max_time = 5
     while conn.func_handler is None or not conn.func_handler.finish_init:
         await asyncio.sleep(1)