add a handler to parse the PrChecker output of a run logfile

This is meant to be used to monitor the physics performance of the MiniBrunel tests which already run.

Basically it only matches the output of the wanted PrChecker part of a log file using regular expressions.
I have run it locally and it created the wanted zip file as well as the json_results which look reasonable.

I will create a merge request on the schedule as well to run the new test with this handler.