Improve lpg and generic car

[k-rieck]

Problem was:

• all system setups that use generic_car.py component used a certain clean_up_old_result_files() function
• there was no caching for utsp car and flexibility data which is needed when running many requests simultaneously

Solution:

• add car and flexibility data to LPG cache files
• add a dataclass car_information to generic_car.py module that takes the car data from occupancy
• generic car component is then initialized with this car information