Fix Creator build with latest Quick3D

Trying to build latest creator 6.0 branch with Quick 3D dev results:

C:\Users\kgron\work\sources\qt-creator\share\qtcreator\qml\qmlpuppet\qml2puppet\editor3d\selectionboxgeometry.cpp(309): error C2039: 'getModelBounds': is not a member of 'QSSGRenderModel'
C:\qt6_3-install\include\QtQuick3DRuntimeRender\6.3.0\QtQuick3DRuntimeRender/private/qssgrhicustommaterialsystem_p.h(60): note: see declaration of 'QSSGRenderModel'
[1234/3616] Building CXX object src\tools\qml2puppet\CMake...qml2puppet.dir\qml2puppet_autogen\mocs_compilation.cpp.obj
ninja: build stopped: subcommand failed.

The related change is https://codereview.qt-project.org/c/qt/qtquick3d/+/381823