Enable running normal ACTIONX keywords from PYACTION

The run() function invoked by PYACTION has got a new fifth argument which is a
callable the script should utilize to apply the keywords from an ACTIONX
keyword. The callable is implemented as C++ lambda which will run the
Schedule::iterateScheduleSection() method and make sure an updated
SimulatorUpdate variable can be passed back to the simulator.

msim/src/msim.cpp

@@ -90,7 +90,7 @@ void msim::post_step(Schedule& schedule, SummaryState& st, data::Solution& /* so
     }
 
     for (const auto& pyaction : actions.pending_python())
-        pyaction->run(this->state, schedule, report_step, st);
+        schedule.runPyAction(report_step, *pyaction, this->state, st);
 }