Auto-evo ModifyExistingSpecies needs to be split into sub-steps as it takes too long to run otherwise

[hhyyrylainen]

The auto-evo architecture was made with the idea in mind that individual step parts would be really quick to run so that runs can abort easily. This is currently not working with the new auto-evo ModifyExistingSpecies step as it can take many seconds to process. From my debugging it seems the mutations generation is the part that takes a really long time, and that should somehow be split into sub-steps.

There's a constant to enable error checking related to this AUTO_EVO_TRACK_STEP_TIME, which will then print:

Single auto-evo step ModifyExistingSpecies took too long! Steps should be split into sub-steps that don't take more than 0.4 seconds, but this step took: 00:00:04.5051732

[GameDungeon]

I believe this was completed

[hhyyrylainen]

The method ModifyExistingSpecies.GenerateMutations still takes a ton of time. And in my profiling when the auto-evo is stuck at a step number for many seconds it is always that method. So that method is still an absolute behemoth that needs to be split up. I could turn on that step time tracking, but I think I would get exactly the same result as in the original description of this issue.