Current Chunk for Entity and Block Entities, counts by entity type

This enables us a fast reference to the entities current chunk instead
of having to look it up by hashmap lookups.

We also store counts by type to further enable other performance optimizations in later patches.

Spigot-Server-Patches/Configurable-Cartographer-Treasure-Maps.patch

@@ -9,7 +9,7 @@ Also allow turning off treasure maps all together as they can eat up Map ID's
 which are limited in quantity.
 
 diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
-index 06911639..50dc50a7 100644
+index 4b9bf3b4f..2ba3bcb8e 100644
 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
 +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
 @@ -0,0 +0,0 @@ public class PaperWorldConfig {
@@ -28,7 +28,7 @@ index 06911639..50dc50a7 100644
 +    }
  }
 diff --git a/src/main/java/net/minecraft/server/EntityVillager.java b/src/main/java/net/minecraft/server/EntityVillager.java
-index 9d201b14..57fcc3c0 100644
+index 9d201b14e..57fcc3c05 100644
 --- a/src/main/java/net/minecraft/server/EntityVillager.java
 +++ b/src/main/java/net/minecraft/server/EntityVillager.java
 @@ -0,0 +0,0 @@ public class EntityVillager extends EntityAgeable implements NPC, IMerchant {