s3sink: Dont set call_timeout,call_attempt_timeout is enough with retry.
When call_timeout is triggered, request will fail irrespective of the retry setting. call_timeout define max time request can take along with retry. It can be solved by either setting call_timeout to retry * call_attempt_timeout or not setting the call_timeout.
As per thread call_attempt and rety setting is enough. https://github.com/awslabs/aws-sdk-rust/issues/558