Pass on NSNotification to QMacNotificationObserver callbacks if supported

Change-Id: I167f2e24453a2f2c75b81207f7293c72243f5a7a
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit c7c830057589a91cc369375775d018c5057ba46a)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/corelib/kernel/qcore_mac_p.h

@@ -336,7 +336,10 @@ public:
     template<typename Functor>
     QMacNotificationObserver(NSObject *object, NSNotificationName name, Functor callback) {
         observer = [[NSNotificationCenter defaultCenter] addObserverForName:name
-            object:object queue:nil usingBlock:^(NSNotification *) {
+            object:object queue:nil usingBlock:^(NSNotification *notification) {
+                if constexpr (std::is_invocable_v<Functor, NSNotification *>)
+                    callback(notification);
+                else
                     callback();
             }
         ];