Update: add OcclusionValidateGroups servervar
- also replaced the conditional log with a logerror, to make sure we spot it
- codegen
Couldn't reproduce the issue locally, so I'm missing something, including whether it was a false-positive or not. This should help check every bad case and confirm whether the issue is legit or not
Tests: used the command in a couple scenarios - players close, players far, players outside of network range, with invis on/off