Draft: fix add clean-up to light bulbs on gt gen environment

Currently:

• Adding multiple traffic lights will always increment the light bulb count if the binary executing the simulation is not reset

After this merge:

• light ids were extracted from a function static variable to a class static variable
• A function was created to reset light ids into the expected start value
• gtgen enviroment now calls the reset in its constructor, ensuring that no traffic light ids survive from previous runs.
• Tests were added