Add vehicle_id Parameter for Launch File Configuration

[MertClk]

Description
Currently, the scenario_test_runner.launch.py file does not support a straightforward way to load vehicle-specific configuration files via vehicle_id, parameter. This requires users to manually modify launch files or environment variables, which can be error-prone and inconvenient when working with multiple vehicles.

Introducing a vehicle_id launch parameter would allow users to specify the vehicle configuration dynamically.

The vehicle_id parameter is essential for launching Autoware in a multi-vehicle repository, as it ensures that each vehicle loads the correct configuration files while preventing conflicts.

Solution

• Add vehicle_id as a launch parameter to scenario_test_runner.launch.py and use it when launching planning_sim internally.

[MertClk]

What do you think about the necessity of this feature?