CullingMask not available on light source (Point/Spot/Directional)

Release Type: Latest 3.1 Dev release.

Version: e01b748

Platform(s): Windows

Describe the bug
CullingMask is not available on the light source in Game Studio. It looks as though some of this was maybe changed under the hood, but the ability to restrict light source application to render groups or entity groups is not available. Feature can be seen here:

https://doc.xenko.com/latest/jp/manual/graphics/lights-and-shadows/spot-lights.html

To Reproduce
Steps to reproduce the behavior:

1. Add a spot light to a scene.
2. Examine the properties in Game Studio.

Expected behavior
Ability to change/modify the render groups, or cull groups from a light source.

Screenshots
See link above.,

Additional context
If the operation for this has changed, we can update the documentation--let me know if this is something I can do. Any info is appreciated, I will attempt to dig deeper in the source and see if this feature may have changed.

Reproduce the issue in Game Studio by adding a spot light and examining its properties, then compare the available controls with the linked Xenko spot-light documentation. Trace the light-source settings to determine whether render-group or culling-group control still exists; done means the behavior is clarified and either restored or documented accurately.