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/client/shadows/shadowsScreenQuad.cpp

@@ -18,6 +18,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 */
 
 #include "shadowsScreenQuad.h"
+#include <IVideoDriver.h>
 
 shadowScreenQuad::shadowScreenQuad()
 {