Debloat IVideoDriver and IrrlichtDevice includes (#15080)

As the project grows, compile time will not go down unless the header mess
is cleaned up one by one to only include exactly what's needed.

irr/src/CIrrDeviceSDL.cpp

@@ -10,6 +10,7 @@
 #include "IGUIEnvironment.h"
 #include "IImageLoader.h"
 #include "IFileSystem.h"
+#include "IVideoDriver.h"
 #include "os.h"
 #include "CTimer.h"
 #include "irrString.h"