Clean up entity interface
- entity interface has no more SetIndicatorState/GetIndicatorState
- Setters-Getters for LightState will be defined in gt-gen-core
- Enums for LightState are defined
- Enums for LightState are realized here for the possible following architecture refactoring
The MR will be followed by the gt-gen-core MR-197|Impelement LightState for vehicle
The MR is aimed at avoiding architectural issues, which were discussed in mantle_api MR-195|Extend IVehicle with getters and setters for all OSI LightStates
Edited by Anastasiia Volkova