Replace kaline tree hardcoded level up cost values with a CurrencyCosts relation

[lotuuu]

This abstraction would require us to replace the Kaline Tree level up costs for currency_costs, which is a task that's outside the scope of this PR. It's also a beta feature. I'll create a ticket for it!

Originally posted by @lotuuu in lambdaclass/mirra_backend#593 (comment)