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.

src/gui/guiScene.cpp

@@ -21,6 +21,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #include <SViewFrustum.h>
 #include <IAnimatedMeshSceneNode.h>
+#include <IVideoDriver.h>
 #include "porting.h"
 
 GUIScene::GUIScene(gui::IGUIEnvironment *env, scene::ISceneManager *smgr,