Always update checkrun status for terraform workflows

[asubrocky]

Why?

• Terraform workflows cannot cancel due to WaitForCancellation, so we might as well try to update the status of the checkrun.
• We also think this will help with the non determinism issues we are seeing where cancellations can occur at different than expected times on replay, causing the checkrun cache to be inaccurate, thus causing wrong calls to either create or update.