configuration: Move CreateWidget to a class

We were passing so many objects between the function and the caller that
it needed to be redesigned.

src/yuzu/configuration/configure_graphics.h

@@ -15,6 +15,7 @@
 #include "vk_device_info.h"
 #include "yuzu/configuration/configuration_shared.h"
 
+class QPushButton;
 class QEvent;
 class QObject;
 class QComboBox;