InputMethodQueryResult - use int as a key, not Qt::InputMethodQuery

In release mode different qHash overloads picked up for enumerators
in 2 different translation units (and this can be even affected by the
order of includes), thus resulting in one hash with which we insert
a value, and a different hash, when we are trying to extract the value,
which _is_ in QHash; getting us a default value (invalid QVariant in our case).

Pick-to: 6.2 6.4
Fixes: QTBUG-106219
Change-Id: I7cce35555d792f03e50639a8d3d25f6a74de05a6
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

src/plugins/platforms/cocoa/qcocoahelpers.h

@@ -313,7 +313,7 @@ QSendSuperHelper<Args...> qt_objcDynamicSuperHelper(id receiver, SEL selector, A
 
 // -------------------------------------------------------------------------
 
-struct InputMethodQueryResult : public QHash<Qt::InputMethodQuery, QVariant>
+struct InputMethodQueryResult : public QHash<int, QVariant>
 {
     operator bool() { return !isEmpty(); }
 };