QLoggingRegistry: disable copying

It's not copied, and copying would probably be a bad idea, so make
sure it's not done inadvertently.

Pick-to: 6.6 6.5
Change-Id: Ia7397906c0efb07ac5e079580bdbb15f4bf4911e
Reviewed-by: Kai Köhne <kai.koehne@qt.io>
(cherry picked from commit 3a2d8c5828efee9f182c260f55720d3bb6152893)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/corelib/io/qloggingregistry_p.h

@@ -85,6 +85,7 @@ private:
 
 class Q_AUTOTEST_EXPORT QLoggingRegistry
 {
+    Q_DISABLE_COPY_MOVE(QLoggingRegistry)
 public:
     QLoggingRegistry();