Add flag to exit with non-zero status code when not passing

[tyxeron]

Is your feature request related to a problem? Please describe.

We use preflight check in our CI infrastructure to ensure our images will pass the preflight check once we submit it. There is currently no way to tell preflight check to exit with a non-zero code in case of any failed tests.

Describe the solution you'd like.

It would be helpful to have a flag like --exit-with-failure or something similar, that will return a non-zero status code when the preflight check did not pass. The operator pipeline has --exit-with-pipelinerun-error for example.

Describe alternatives you've considered.

The workaround is to parse the output and check if passed is true.

[acornett21]

• Relates: Exit code doesn't change based on success or failure #535