fix(lane_change): consider max velocity during path planning (autowarefoundation#6615)

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

Author: zulfaqar-azmi-t4

planning/behavior_path_planner_common/include/behavior_path_planner_common/parameters.hpp

@@ -42,6 +42,7 @@ struct BehaviorPathPlannerParameters
   // common parameters
   double min_acc;
   double max_acc;
+  double max_vel;
 
   double minimum_pull_over_length;
   double minimum_pull_out_length;