Chance for moose, coyotes, and rattlesnakes to birth mutant babies

[Karol1223]

Summary

None

Purpose of change

#75830 is closed. My prayers have been answered.

Describe the solution

• Add a 5% chance for non-mutated coyotes, moose, or timber rattlesnakes to birth a mutant baby instead of a normal one
• By extension I had to add mutant coyote pups, and made mutant coyotes reproduce as well
• Delayed tusked moose spawns by how long it takes for a tusked moose calf to grow to adulthood post #74554
• Re-added mutant coyote spawns that got removed... at some point? I honestly don't know when. I just know they didn't spawn
• Re-added mutant rattlesnake spawns because I accidentally removed them entirely in #75829

Describe alternatives you've considered

• Beavers - next in line, I'll get to them soon, they need it the most because similar to mutant coyotes, mutant beavers stopped spawning a while ago
• Raccoons, bears, deer - I'll get to them while auditing their non-mutated counterparts
• Crows, carp - need a more thorough audit in a separate PR
• Dogs, frogs - I don't want to make a bazillion monstergroups for all types of them yet so I'm putting it off
• Salmon - needs a couple new babies to get the same treatment rattlesnakes did here

Testing

Additional context