add parameter for enabling frenet

Signed-off-by: Zulfaqar Azmi <zulfaqar.azmi@tier4.jp>

Author: zulfaqar-azmi-t4

autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_path_planner/lane_change/lane_change.param.yaml

@@ -30,6 +30,10 @@
         min_road_shoulder_width: 0.5  # [m]
         th_parked_vehicle_shift_ratio: 0.6
 
+      # trajectory generation near terminal using frenet planner
+      frenet:
+        enable: true
+
       # safety check
       safety_check:
         allow_loose_check_for_cancel: true