Commander: Add function to print health flags consistently

This enables us to have better situational awareness during development and when inspecting a system in the field as to which subsystem is currently faulty. These flags are from standard MAVLink and are not sufficient nor do they match well the actual critical path to a safe flight. This will be addressed in a second step with the addition of a new MAVLink message and new flags.

src/modules/commander/Commander.cpp

@@ -292,6 +292,8 @@ extern "C" __EXPORT int commander_main(int argc, char *argv[])
 					PreFlightCheck::arm_requirements_t{}, status);
 		PX4_INFO("Prearm check: %s", prearm_check_res ? "OK" : "FAILED");
 
+		print_health_flags(status);
+
 		return 0;
 	}