dummy data is always injected via context properties. Since those are now deprecated, we don't have a good replacement mechanism. Users will need to modify their view-layer QML files to use different models.
In qmlscene this is a "magic" feature that doesn't even require an option. We should remove it there too if we were keeping qmlscene as a tool; but we aren't.
|For Gerrit Dashboard: QTBUG-96800
|WIP add back information about qml's options, with details about import path