Add configuration option to control fix for MC-159283 end rings

paper-server/patches/sources/ca/spottedleaf/moonrise/paper/PaperHooks.java.patch

@@ -203,7 +203,7 @@
 +
 +    @Override
 +    public boolean configFixMC159283() {
-+        return true;
++        return GlobalConfiguration.get().misc.fixEndRings;
 +    }
 +
 +    @Override

paper-server/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java

@@ -345,6 +345,8 @@ public class GlobalConfiguration extends ConfigurationPart {
         public boolean preventNegativeVillagerDemand = false;
         @Comment("Whether the nether dimension is enabled and will be loaded.")
         public boolean enableNether = true;
+        @Comment("Keeps Paper's fix for MC-159283 enabled. Disable to use vanilla End ring terrain.")
+        public boolean fixEndRings = true;
     }
 
     public BlockUpdates blockUpdates;