Allow enabling sand duping (#10191)

Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable.

It should be noted that this decision does not promise all future exploits will be configurable.

patches/server/0741-Add-PlayerStopUsingItemEvent.patch

@@ -0,0 +1,18 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: u9g <git@u9g.dev>
+Date: Tue, 3 May 2022 20:41:37 -0400
+Subject: [PATCH] Add PlayerStopUsingItemEvent
+
+
+diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
+index 511e8e789932df77999689659d1efbe311339e40..79fd521d5c4a8d6acd2b4f946dfdcc7b4e641b75 100644
+--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
++++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
+@@ -4045,6 +4045,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
+ 
+     public void releaseUsingItem() {
+         if (!this.useItem.isEmpty()) {
++            if (this instanceof ServerPlayer) new io.papermc.paper.event.player.PlayerStopUsingItemEvent((Player) getBukkitEntity(), useItem.asBukkitMirror(), getTicksUsingItem()).callEvent(); // Paper - Add PlayerStopUsingItemEvent
+             this.useItem.releaseUsing(this.level(), this, this.getUseItemRemainingTicks());
+             if (this.useItem.useOnRelease()) {
+                 this.updatingUsingItem();