Replace ScriptInterface::Call* with new ScriptFunction functions

Finishes work started in f3aedf88a6.
This removes the boost-CPP function wrappers entirely, in favour of pure
templated code in FunctionWrapper.h
The Call* functions were already heavily templated, so there is nothing
really new here. I just use tag dispatch to reduce the number of
overloads slightly.

The new functions do not need the script interface, only the script
request.

Differential Revision: https://code.wildfiregames.com/D3912
This was SVN commit r25354.

source/ps/GameSetup/HWDetect.cpp

@@ -226,7 +226,7 @@ void RunHardwareDetection()
 
 	// Run the detection script:
 	JS::RootedValue global(rq.cx, rq.globalValue());
-	scriptInterface.CallFunctionVoid(global, "RunHardwareDetection", settings);
+	ScriptFunction::CallVoid(rq, global, "RunHardwareDetection", settings);
 }
 
 static void ReportSDL(const ScriptInterface& scriptInterface, JS::HandleValue settings)