Update to Minecraft 1.21

By: md_5 <git@md-5.net>

paper-server/nms-patches/net/minecraft/world/entity/EntityCreature.patch

@@ -11,19 +11,3 @@
  public abstract class EntityCreature extends EntityInsentient {
  
      protected static final float DEFAULT_WALK_TARGET_VALUE = 0.0F;
-@@ -67,6 +71,7 @@
- 
-             if (this instanceof EntityTameableAnimal && ((EntityTameableAnimal) this).isInSittingPose()) {
-                 if (f > 10.0F) {
-+                    this.level().getCraftServer().getPluginManager().callEvent(new EntityUnleashEvent(this.getBukkitEntity(), EntityUnleashEvent.UnleashReason.DISTANCE)); // CraftBukkit
-                     this.dropLeash(true, true);
-                 }
- 
-@@ -75,6 +80,7 @@
- 
-             this.onLeashDistance(f);
-             if (f > 10.0F) {
-+                this.level().getCraftServer().getPluginManager().callEvent(new EntityUnleashEvent(this.getBukkitEntity(), EntityUnleashEvent.UnleashReason.DISTANCE)); // CraftBukkit
-                 this.dropLeash(true, true);
-                 this.goalSelector.disableControlFlag(PathfinderGoal.Type.MOVE);
-             } else if (f > 6.0F) {