Add wet-farmland

[Pantera07]

https://github.com/PaperMC/Paper/pull/9968

There are two options: dry-farmland and wet-farmland, the reason it is separate is because the performance impact of dry farmlands isn't that big, but has a big gameplay impact where players may be confused about why the farmland isn't wet after placing water near it. Yes, dry farmlands have the same isNearWater checks as wet farmlands, but dry farmlands do end up turning to regular dirt after a while, so it is like they are "naturally" throttled by the server.