Radiator Springs add-on v1.3 for ATS 1.39

Changelog v1.3:
Adaptation to ATS 1.39
Base map touch-ups merge
Note: Due to the WIP shift to the new sound system by SCS there is no possibility to add sounds in the map editor at the moment. Therefore, in-game sounds (recognisable songs from the movie and the waterfall sound) have been removed temporarily.

Tested on a clean profile on ATS 1.39 and in combination with the following map mods:
- ProMods Canada 1.0
- Reforma Sierra Nevada 2.2.29
- Reforma Mexico Extremo 2.1.18
- PazzMod 1.4
- Australian Outback Map 1.39
- Grand Canyon Rebuild 1.1