Fix another mutant meat exploit

[Davi-DeGanne]

Summary

SUMMARY: None

Purpose of change

There was an unintended behavior where if you made mutant meat into jerky, then made something using that jerky, it would not inherit the negative effects of mutant meat.

This was caused by jerky inheriting cooks_like from meat.

Describe the solution

Got rid of jerky's cooks_like (and other superfluous properties) by making it inherit from the abstract type flesh instead of meat. Added "price": 320 and removed proportional price entry, since flesh doesn't have its own price entry. Removed healthy property as that was now redundant due to being inherited from flesh.

Describe alternatives you've considered

Testing

Additional context