Cache computed values in `Options.cs`

There’s a couple of methods in Options.cs that are likely being called from hotpath - I assume return values will get cached by JIT or something, but it wouldn’t harm to just cache the values when option values change…

_Originally posted by @aubergine10 in https://github.com/CitiesSkylinesMods/TMPE/pull/1512#discussion_r842025062_

getRecklessDriverModulo()

This converts reckless driver drop-down value in to a modulo. We should calculate it whenever reckless dirver option changes and cache result in an int field.

Additionally, code intent can be clarified with switch expression:

internal static int RecklessDriverModulo(RecklessDrivers level) => level switch
{
    RecklessDrivers.PathOfEvil => 10,
    RecklessDrivers.RushHour => 20,
    RecklessDrivers.MinorComplaints => 50,
    RecklessDrivers.HolyCity => 10000,
    _ => 10000,
};

IsDynamicLaneSelectionActive()

This can be invoked whenever the associated options (Advanced Vehicle AI checkbox and DLS slider) change and result cached in a bool field.

[krzychu124]

We are going to change serialization so there is a chance (since you’ve set the issue as low priority) 😉

[krzychu124]

Obtaining cached value from field will be faster than function call?

Not always, but… why not enum with values (xyz = 2, abc = 10 etc)? Value will be compiled as int so zero impact on performance, and you can also compare them like this Enum.Value1 < Enum.Value2 if necessary (see SimulationAccuracy).

IL code