Regression: build warnings of missing properties

Note: the issue appears to only occur when building with MSVC, the example application can be built without problems on MinGW.

Description:

There is a regression when upgrading from Qt 6.5.8 to 6.5.9.

If you take the attached example application and build it:

• Qt 6.5.8: build is clean without warnings.
• Qt 6.5.9: every readonly property in Constants.qml throws a warning.

(See the attached logs)

Example of a warning:

Warning: Main.qml:5:39: Member "windowDefaultWidth" not found on type "QObject" [missing-property]
    width: Const.Constants.dimensions.windowDefaultWidth
                                      ^^^^^^^^^^^^^^^^^^

The application runs correctly in both cases, but for a large project the build logs become unreadable due to unnecessary warnings.