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: 6.7 6.6 6.5
Change-Id: Ia7397906c0efb07ac5e079580bdbb15f4bf4911e
Reviewed-by: Kai Köhne <kai.koehne@qt.io>

src/corelib/io/qloggingregistry_p.h

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