Fix target lane-id type from unsigned long to int to match OpenDrive...

Fix target lane-id type from unsigned long to int to match OpenDrive specification (id can be negative)

MantleAPI/include/MantleAPI/Traffic/control_strategy.h

@@ -232,7 +232,7 @@ struct PerformLaneChangeControlStrategy : public ControlStrategy
     type = ControlStrategyType::kPerformLaneChange;
   }
 
-  mantle_api::UniqueId target_lane_id{0};
+  std::int64_t target_lane_id{0};
   units::length::meter_t target_lane_offset{0.0};
   TransitionDynamics transition_dynamics{};
 };