Test Harness should report the cli command used on the test

It would be really useful to report the command that runs the test along with the sysout if a test fails.

If the test fails early enough and there is no trace, then it can be impossible to tell which test and seed is failing. I ran into this when I added assert to Trace.cpp. The sysout told me some tests hit this assert, but I'm still not sure which test in joshua was hitting this assert 😅