Add mandatory pit stops to medium or longer races

[PJTierney]

Worth sharing thoughts in the Tyre Wear thread too.

Tire wear in Featured Multiplayer | Update 13

Featured Multiplayer [All Platforms] Updated Tire Wear Scalar for all Short and Medium length races to 4x, making tire wear consistent across Short, Medium, and Long races in Featured Multiplayer. For discussion. Please try out the new setting and provide feedback.