Bug: Vehicles should not be scaled down when other monsters in an instance are scaled down.

### Current Behaviour

Vehicles are scaled down along with all other NPCs in an instance.

### Expected Behaviour

Vehicles should be unaffected just like players. Vehicles are, in effect, extensions of players.

### Steps to reproduce the problem

Enter any vehicle based fight solo.

You will be unable to do enough damage for it to matter while in a vehicle.

### Extra Notes

When the instance has a boss scaled down, it is presumably to make it so, for instance, 1 player can make up for not having the other 9 or 24. By making vehicles also scale down this completely negates the purpose of scaling in any fight involving vehicles.

### AutoBalance Debug Commands

_No response_

### AC rev. hash/commit

Current version.

### Operating system

Windows 11

### Custom changes or Modules

_No response_

Start with the solo vehicle-based fight described in the reproduction steps and compare vehicle damage when the instance boss is scaled down. Trace the instance scaling behavior for NPCs and verify that vehicles remain unaffected like players; done means vehicle fights retain effective damage while other scaling still works.

Written by the indexing model from the issue text.