invalid right-on-red conflict in response matrix

[namdre]

This is similar to #17076 insofar it doesn't create a problem at the moment but interferes with the potential solution for #17056

Vehicles from the side road naturally respond to all main-road foes that target the same edge.

• At a normal traffic light, these roads are not active at the same time (except for stranded conflicts)
• At traffic_light_right_on_red, the straight connections yield to all right-turns from the main road even in the straight-main phase where the permissive right turn must yield. This creates a needless braking if the connections target non-conflicting lanes on the same edge.

Problem: this conflict would be valid when switching the tls off (so a single matrix doesn't cover all cases).