poll .GetBatch() instead of using operation.result()

[colin-rogers-dbt]

• re:PR 738/wazi #840
• adding back comment # check if job failed
• adding changelog
• precommit code format
• sleep(2) first in the while loop before the request to eliminate the last 2 seconds sleep if the response is in one of the 3 options
• removing empty spaces
• update batch request to handle GetBatchRequest

resolves #734
docs dbt-labs/docs.getdbt.com/#

Problem

Solution

Checklist

• I have read the contributing guide and understand what's expected of me
• I have run this code in development and it appears to resolve the stated issue
• This PR includes tests, or tests are not required/relevant for this PR
• This PR has no interface changes (e.g. macros, cli, logs, json artifacts, config files, adapter interface, etc) or this PR has already received feedback and approval from Product or DX