Bug: linear and ease in/out orientation modes on func_tracktrain don't work

[fifflesniffle]

Describe the bug

self explanatory. tracktrain just snaps to the orientation of the path_track instead of actually blending.

To Reproduce

make a train turn and set the orientation mode to linear or ease in/ease out

Issue Map

https://drive.google.com/file/d/1ntj3Euk-EpPlTJn4vO6UKh17JO9jYLPO/view?usp=sharing

Expected Behavior

the train actually blends orientation

Operating System

No response