Indicate tests which passed with historical threshold
With #251 (closed) closed, GPT will be able to handle test thresholds for older GitLab versions. While it's helpful to mark the test as passed using historical thresholds, we should consider indicating that the test passed with this caveat. This should motivate customers to upgrade their GitLab instance to the latest one.
Thanks @tpazitny for bringing this point to the discussion about #251 (closed)!