Make enableTreasureMaps apply to shipwreck loot generation

Fixes #3480
Previously it only controlled whether villagers could trade treasure maps.
Now it should apply to loot generated in treasure maps.

We don't unregister treasure maps from the loot table,
since this option is per-world and the table is global.
Instead I just replaced the implementation with a NOP.

Spigot-Server-Patches/Configurable-Cartographer-Treasure-Maps.patch

@@ -27,6 +27,26 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        }
 +    }
  }
+diff --git a/src/main/java/net/minecraft/server/LootItemFunctionExplorationMap.java b/src/main/java/net/minecraft/server/LootItemFunctionExplorationMap.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/LootItemFunctionExplorationMap.java
++++ b/src/main/java/net/minecraft/server/LootItemFunctionExplorationMap.java
+@@ -0,0 +0,0 @@ public class LootItemFunctionExplorationMap extends LootItemFunctionConditional
+ 
+             if (blockposition != null) {
+                 WorldServer worldserver = loottableinfo.c();
++                // Paper start
++                if (!worldserver.paperConfig.enableTreasureMaps) {
++                    /*
++                     * NOTE: I fear users will just get a plain map as their "treasure"
++                     * This is preferable to disrespecting the config.
++                     */
++                    return itemstack;
++                }
++                // Paper end
+                 BlockPosition blockposition1 = worldserver.a(this.d, blockposition, this.g, this.h);
+ 
+                 if (blockposition1 != null) {
 diff --git a/src/main/java/net/minecraft/server/VillagerTrades.java b/src/main/java/net/minecraft/server/VillagerTrades.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/net/minecraft/server/VillagerTrades.java

Spigot-Server-Patches/MC-Dev-fixes.patch

@@ -428,6 +428,19 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                  this.b();
                  this.g.set(false);
              }));
+diff --git a/src/main/java/net/minecraft/server/LootItemFunctionExplorationMap.java b/src/main/java/net/minecraft/server/LootItemFunctionExplorationMap.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/LootItemFunctionExplorationMap.java
++++ b/src/main/java/net/minecraft/server/LootItemFunctionExplorationMap.java
+@@ -0,0 +0,0 @@ public class LootItemFunctionExplorationMap extends LootItemFunctionConditional
+         }
+ 
+         public void a(JsonObject jsonobject, LootItemFunctionExplorationMap lootitemfunctionexplorationmap, JsonSerializationContext jsonserializationcontext) {
+-            super.a(jsonobject, (LootItemFunctionConditional) lootitemfunctionexplorationmap, jsonserializationcontext);
++            super.a(jsonobject, lootitemfunctionexplorationmap, jsonserializationcontext); // Paper - decompile fix
+             if (!lootitemfunctionexplorationmap.d.equals("Buried_Treasure")) {
+                 jsonobject.add("destination", jsonserializationcontext.serialize(lootitemfunctionexplorationmap.d));
+             }
 diff --git a/src/main/java/net/minecraft/server/LootSelectorEntry.java b/src/main/java/net/minecraft/server/LootSelectorEntry.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/net/minecraft/server/LootSelectorEntry.java