Unify error handler and late window record output for SQL api

[Yi Tang]

Hi,
I'm looking for a way to handle potential errors in job submitted with SQL
API, but unfortunately nothing found.
Handle errors manually in SQL API is hard, I think. Is there a way to
handle all errors and send them to a SideOutput to avoid task failure.

Also one can put late records into a SideOutput in streaming API, looks
like there's no equivalent in SQL API.

Thanks.