If we are dealing with dynamic metaobjects, the QML engine may not
create property caches. We cannot see this at compile time. Therefore,
we need to establish a fallback infrastructure that does the same
operations on plain QMetaObject.
Pick-to: 6.2 6.3
Fixes: QTBUG-101349
Change-Id: I8c936fc077b0018df71196620b6987825253cb39
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Ulf Hermann