Bug: VRAD calculates lightmaps for all bodygroups on static props

[lunairekitty]

Describe the bug

In a bug originating since the inception of Source, models with $staticprop will have lighting calculated for every bodygroup, even ones that are never enabled or visible.

To Reproduce

1. Make a model with $staticprop and some $bodygroups.
2. Put it in a map
3. Calculate lighting

Issue Map

Not applicable

Expected Behavior

When lighting is calculated for a static prop it should ignore disabled/unused bodygroups.

Operating System

Windows 11 25H2