Scripts/Icecrown: Add script* support for Borrowed Technology/Volatility quests

* There are heavy core problems that make it not fully functional for now.
1) Enter vehicle of 31578 is being overriding the vehicle aura of the accessory so it kicks it out. (both get applied to 1, but instead decoy should be to 0).
2) Even if mentioned above get fixed the accessory is supposed to implicitly hit another passenger with explosion
and no seat flags for it even unknown.
3) Armored Decoy doesn't keep emote from freeze mechanic when enter vehicle connected with a not supported flag.
4) Vehicle speed seems too fast (there is some general vehicle not correct speed problem with spline being involved).

Connected with: #5757
Core/Vehicles: Give description to unknown seat flag

* There are 28 vehicles using for what is stated in the description  - it handles keeping specific emote states (animations) for passengers entering vehicles, I'm not 100% sure if is connected with the aura states that apply them. There are videos for every single known creature that is using it. 31583 - is clearest example since has only this flag as unknown on seat 0. Putting it here only to give direction to where researching should be made if someone dig into it more or can implement support for it.