feat(obstacle_cruise_planner): min_behavior_stop_margin 6m -> 3m (autowarefoundation#814) (autowarefoundation#844)

Signed-off-by: Takayuki Murooka <takayuki5168@gmail.com>
Co-authored-by: Takayuki Murooka <takayuki5168@gmail.com>

Author: TomohitoAndo

autoware_launch/config/planning/scenario_planning/lane_driving/motion_planning/obstacle_cruise_planner/obstacle_cruise_planner.param.yaml

@@ -21,7 +21,7 @@
 
       nearest_dist_deviation_threshold: 3.0 # [m] for finding nearest index
       nearest_yaw_deviation_threshold: 1.57 # [rad] for finding nearest index
-      min_behavior_stop_margin: 6.0 # [m]
+      min_behavior_stop_margin: 3.0 # [m]
       stop_on_curve:
         enable_approaching: true
         additional_safe_distance_margin: 2.0 # [m]