QIODevicePrivate: disable copy/move SMFs

Clazy complained about this polymophic class being copyable.

Change-Id: I05087bb7fcf7112136e5d62c108ea460569f2aa0
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

src/corelib/io/qiodevice_p.h

@@ -75,6 +75,7 @@ class Q_CORE_EXPORT QIODevicePrivate
 #endif
 {
     Q_DECLARE_PUBLIC(QIODevice)
+    Q_DISABLE_COPY_MOVE(QIODevicePrivate)
 
 public:
     QIODevicePrivate();