Added 4 new attributes to the vehicle blueprints

[glopezdiest]

Description

Added 4 new attributes to all vehicles:
- base_type used as a vehicle classification (car, truck, van, motorcycle and bycicle).
- special_type provides more information about the vehicle (currently electric, emergency, taxi, and the rest are empty).
- has_dynamics_doors either true or false, depending on the vehicle being able (or not) to open their doors.
- has_lights either true or false, depending on the vehicle being able (or not) to turn on their lights.

This PR goes hand in hand with another one at our content, where these attribute values are set

The values chosen are as follows:

Where has this been tested?

• Platform(s): Ubuntu 18.04
• Python version(s): 3.6
• Unreal Engine version(s): CARLA's 4.26

Possible Drawbacks

None? This just add more functionailities, and removes nothing.

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This change is 

[Axel1092]

Reviewed 5 of 6 files at r1, 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @bernatx and @XGodina)

[Axel1092]

Reviewed 2 of 2 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @bernatx and @XGodina)