Copy itemstack when sanitizing for datawatcher items

Since the packet is broadcasted for players, it means that
the packet will be sent to multiple players. In this case,
modifying the data results in a possible race condition
where a CME may occur as the packet will be serialized on
many different netty IO threads.

patches/server/0736-Prevent-sending-oversized-item-data-in-equipment-and.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] Prevent sending oversized item data in equipment and metadata
 
 
 diff --git a/src/main/java/net/minecraft/network/syncher/EntityDataSerializers.java b/src/main/java/net/minecraft/network/syncher/EntityDataSerializers.java
-index 97da8896865ff0bdd4fe8f2155b0830b42051bb1..17d0519ce3c097a38f9867fff3e1c25eb7febb59 100644
+index 97da8896865ff0bdd4fe8f2155b0830b42051bb1..9ca897d92c5bdd2764d114c74d64c776674d6beb 100644
 --- a/src/main/java/net/minecraft/network/syncher/EntityDataSerializers.java
 +++ b/src/main/java/net/minecraft/network/syncher/EntityDataSerializers.java
 @@ -42,7 +42,7 @@ public class EntityDataSerializers {
@@ -13,7 +13,7 @@ index 97da8896865ff0bdd4fe8f2155b0830b42051bb1..17d0519ce3c097a38f9867fff3e1c25e
          @Override
          public void write(FriendlyByteBuf buf, ItemStack value) {
 -            buf.writeItem(value);
-+            buf.writeItem(net.minecraft.world.entity.LivingEntity.sanitizeItemStack(value, false)); // Paper - prevent oversized data
++            buf.writeItem(net.minecraft.world.entity.LivingEntity.sanitizeItemStack(value, true)); // Paper - prevent oversized data
          }
  
          @Override