Expose turn weight in debug tiles

[TheMarex]

While backporting #3790 to 5.6 I noticed that we don't export the turn weight only the duration, so I added this 66cc997.

This needs to be ported to master again.

[daniel-j-h]

cc @danpat should be exposed in the Debug viewer, too.

Debugging weights and not only speeds is now important for users.

[daniel-j-h]

For debugging purpose it would be great to not only have the turn weight available in the tiles but also have the map visually highlight these penalized turns when they have a high weight (weight max).

This would allow us to immediately spot turns into restricted areas.