refactor: QueryResultFetcher should add a shutdown channel to listen on task failure

[BowenXiao1999]

Now, after all stages are scheduled, QueryResultFetcher will begin to work and use get_data to fetch results.

According to #3908 , the executor can not throw error through channels. It's possible that QueryResultFetcher may already start to work (All stages are created), but some other task get execution failed later, in this case the QueryResultFetcher won't know it.

One solution is to add a shutdown channel channel when running QueryResultFetcher, if one task execution fail, this shutdown channel will receive the info and return error.

cc @liurenjie1024

[liurenjie1024]

LGTM