[included] Improved Ai for "Daimler Teststrecke 2.3" by "Rainmaker_87" 1.0

edit: "Rainmaker_87" included this ai now on his original track

Improved Ai and Sidelines for "Daimler Teststrecke" version 2.3.
Track was made by "Rainmaker_87".
Improvement is around ~2,5 seconds.
(Danger left and danger right in ai_hints are necessary because of all the sausage kerbs.)