fix: stop ghee from spoiling as fast as butter

[RoyalFox2140]

Checklist

Required

• I wrote the PR title in conventional commit format.
• I ran the code formatter.
• I linked any relevant issues using github keyword syntax so it can be closed automatically.
• I have committed my changes to new branch that isn't main so it won't cause conflict when updating main branch later.

Purpose of change

When #4113 ported Nonperishable overhaul the spoil time for ghee was deleted, but it copies from butter. It was meant to not spoil in that PR, this overwrites it to not spoil.

Describe the solution

Spoils in is set to 0 days

Describe alternatives you've considered

None

Testing

Tests.

Additional context

Not a day goes by when I don't hate copy-from.

[chaosvolt]

Funny enough I'm fairly certain Nonperishable Overhaul didn't actually include an override for ghee, since it wasn't in the game back when I added it and it's almost always found in sealed jars anyway...

Definitely should last longer than regular butter either way, it probably could be okay with still being perishable but longer-lasting but on the other hand this gives the player an additional way to preserve milk, plus long-term perishable foods are still wonky anyway so this is fine too.