[Bug] Rest ET should return status code if http request failed

[chncaesar]

This code returns status 0; It should return 404, since http://mlsql/tech/api does not exist.

load Rest.`http://mlsql.tech/api` where
`config.connect-timeout`="10s"
and `config.method`="GET"
and `config.retry`="2"
and `header.content-type`="application/json"
AS result_1;
   
select string(content) AS content_1, status from result_1 AS result_2;

screen shot