Prevent lava from loading chunks

[RecursivePineapple]

In my world lava constantly loads chunks, causing quite a big performance hit. It's not so big that it's causing tps lag, but at the same time it's taking up 10-20% of my tick time, so it's low hanging fruit.

I've redirected several World.getBlock + analogues to check if the chunk is loaded first, and if it's not, bail. This change is fairly low risk, since this logic is only used to set flammable things around lava on fire.

Before:
https://spark.lucko.me/kUlsa23drS

BlockLiquidStatic only calls the update method, which only contains the fire logic for lava.

After:
https://spark.lucko.me/xjzUlFbAka

[Caedis]

I think grass blocks also had the same issue except with spreading

nvm, we already fixed it for grass

[RecursivePineapple]

Fixed the after spark link

[Pilzinsel64]

Just a few small suggestions from my side:

1. Maybe consider using blockExists instead of chunkExists as it does the shifting for you with some sanity checks. :)
2. Would the WrapMethod be an option here instead of Redirect?

[RecursivePineapple]

@Pilzinsel64 I didn't think it was worth the extra method call, but I swapped to blockExists anyways. I used Redirect to avoid the mandatory allocations that the Wrap injectors have. I doubt there would ever be conflicting mixins, so it should be fine here.

[Dream-Master]

@Pilzinsel64