fix:[TD-32471]set error code to terrno if tmq_consumer_poll return NULL

docs/en/14-reference/09-error-code.md

@@ -535,6 +535,5 @@ This document details the server error codes that may be encountered when using
 | 0x80004001 | Consumer mismatch     | The vnode requested for subscription and the reassigned vnode are inconsistent, usually occurs when new consumers join the same consumer group | Internal error, not exposed to users         |
 | 0x80004002 | Consumer closed       | The consumer no longer exists                                | Check if it has already been closed          |
 | 0x80004017 | Invalid status, please subscribe topic first | tmq status invalidate                 | Without calling subscribe, directly poll data     |
-| 0x80004018 | TMQ poll timeout | timeout is too small or there is no data to consume               | Adjust the timeout parameter appropriately or check if the data has been consumed     |
 | 0x80004100 | Stream task not exist | The stream computing task does not exist                     | Check the server-side error logs             |
 

docs/zh/14-reference/09-error-code.md

@@ -555,6 +555,5 @@ description: TDengine 服务端的错误码列表和详细说明
 | 0x80004001 | Consumer mismatch     | 订阅请求的vnode和重新分配的vnode不一致，一般存在于有新消费者加入相同消费者组里时 | 内部错误，不暴露给用户         |
 | 0x80004002 | Consumer closed       | 消费者已经不存在了                                                               | 查看是否已经close掉了          |
 | 0x80004017 | Invalid status, please subscribe topic first | 数据订阅状态不对                                                                 | 没有调用 subscribe，直接poll数据     |
-| 0x80004018 | TMQ poll timeout | 数据订阅超时，超时时间太短，或者数据消费完毕                                                               | 可适当调大timeout 参数或者检测数据是否消费完毕     |
 | 0x80004100 | Stream task not exist | 流计算任务不存在                                                                 | 具体查看server端的错误日志     |