kcm/rules: Port KCM loading to KPluginMetadata

Passing just the plugin name to the KCM loader has been
deprecated in 5.85. This just affects the standalone loading of
the KCM via the window menu.

src/kcmkwin/kwinrules/main.cpp

@@ -13,6 +13,7 @@
 
 #include <KCMultiDialog>
 #include <KLocalizedString>
+#include <KPluginMetaData>
 
 int main(int argc, char* argv[])
 {
@@ -48,8 +49,10 @@ int main(int argc, char* argv[])
         kcm_args << QStringLiteral("whole-app");
     }
 
+    KPluginMetaData pluginData = KPluginMetaData(QStringLiteral("kcms/kcm_kwinrules"));
+
     KCMultiDialog *dialog = new KCMultiDialog;
-    dialog->addModule(QStringLiteral("kcm_kwinrules"), kcm_args);
+    dialog->addModule(pluginData, kcm_args);
     dialog->setAttribute(Qt::WA_DeleteOnClose);
     dialog->show();