Qt: Re-add IOS version to the game info tab

This was accidentally removed during the Qt migration:
https://github.com/dolphin-emu/dolphin/pull/4734

Source/Core/DolphinQt/Config/InfoWidget.h

@@ -4,12 +4,18 @@
 
 #pragma once
 
+#include <memory>
 #include <string>
 
 #include <QWidget>
 
 #include "UICommon/GameFile.h"
 
+namespace DiscIO
+{
+class Volume;
+}
+
 class QComboBox;
 class QGroupBox;
 class QLineEdit;
@@ -21,6 +27,7 @@ class InfoWidget final : public QWidget
   Q_OBJECT
 public:
   explicit InfoWidget(const UICommon::GameFile& game);
+  ~InfoWidget() override;
 
 private:
   void ChangeLanguage();
@@ -34,6 +41,7 @@ private:
   void CreateLanguageSelector();
   QWidget* CreateBannerGraphic(const QPixmap& image);
 
+  std::unique_ptr<DiscIO::Volume> m_volume;
   UICommon::GameFile m_game;
   QComboBox* m_language_selector;
   QLineEdit* m_name = {};