Validate using_converts_to for food component (#10931)

patches/server/General-ItemMeta-fixes.patch

@@ -1510,6 +1510,14 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          this.handle = new FoodProperties(this.handle.nutrition(), this.handle.saturation(), this.handle.canAlwaysEat(), eatSeconds, this.handle.usingConvertsTo(), this.handle.effects());
      }
  
+@@ -0,0 +0,0 @@ public final class CraftFoodComponent implements FoodComponent {
+ 
+     @Override
+     public void setUsingConvertsTo(ItemStack item) {
++        Preconditions.checkArgument(item == null || !item.isEmpty(), "Item cannot be empty"); // Paper - validate using_converts_to
+         this.handle = new FoodProperties(this.handle.nutrition(), this.handle.saturation(), this.handle.canAlwaysEat(), this.handle.eatSeconds(), Optional.ofNullable(item).map(CraftItemStack::asNMSCopy), this.handle.effects());
+     }
+ 
 @@ -0,0 +0,0 @@ public final class CraftFoodComponent implements FoodComponent {
  
      @Override