cmake 3.31 / ninja regressions with UIC and Widget

Since cmake 3.31, the configuration and build of Qt fails when using the ninja multi-config generator. See attached log.

cmake now spawns a huge amount of warnings with this latest official version and causes this failure:

ninja: error: 'qtbase/src/widgets/Widgets_autogen/include_Debug/dialogs/ui_qfiledialog.h', needed by 'cmake_object_order_depends_target_Widgets_DEBUG', missing and no known rule to make it 

With cmake 3.30.5 on the other hand the same still works fine.