fix: Fixes loot with zero amount (#1666)

### Summary

* Adds logging if Amount goes to zero. It should never go to zero!
* Deletes an item if it mutates with zero amount.
* Eliminates possible allocation from `params` for `Type[][]` loot pack construction.
* Renames `Loot.ChestOfHeirloomsContains` to `Loot.RandomChestOfHeirloomsContent`.

Projects/UOContent/Engines/Treasures of Tokuno/LesserArtifacts.cs

@@ -479,7 +479,7 @@ public partial class ChestOfHeirlooms : LockableContainer
 
         for (var i = 0; i < 10; ++i)
         {
-            var item = Loot.ChestOfHeirloomsContains();
+            var item = Loot.RandomChestOfHeirloomsContent();
 
             var attributeCount = Utility.RandomMinMax(1, 5);
             var min = 20;