sublane misbehavior when overtaking stopped vehicles

[namdre]

problematic tests:

• sublane_model/overtake_stopped//overtake_stopped_on_the_left_low_space (wiggling before eventual overtake)
• sublane_model/overtake_stopped/stopped_right (flow much worse than in default model)
• sublane_model/overtake_stopped/stopped_2left (each vehicle blocks 2 lanes, vehicles are standing at 90 degrees)
• sublane_model/overtake_stopped/stopped_slalom (wiggling and teleport)

related to #16232 but the model SL2015 was designed to look at all lanes of the current edge and manages to overtake 2 stopped vehicles in some cases.