Add support for adjusting humanoid rig based on Scale Adjuster values

[bdunderscore]

When scale adjuster is used to change the length of a bone, the child bone positions are reverted at runtime, presumably based on humanoid rig data. We should adjust the rig to prevent this behavior.

https://discord.com/channels/1157554007095652392/1279478335281430632/1280869714343624795