Simplify and slightly optimize EntityClassDescriptor

Could probably also be a record, though I'll look into that at another time

src/main/java/carpet/script/api/Entities.java

@@ -244,7 +244,7 @@ public class Entities {
         {
             if (lv.size() > 1) throw new InternalExpressionException("'entity_types' requires one or no arguments");
             String desc = (lv.size() == 1)?lv.get(0).getString():"*";
-            return EntityValue.getEntityDescriptor(desc, ((CarpetContext) c).s.getServer()).listValue;
+            return EntityValue.getEntityDescriptor(desc, ((CarpetContext) c).s.getServer()).listValue();
         });
 
         expression.addContextFunction("entity_load_handler", -1, (c, t, lv) ->
@@ -255,7 +255,7 @@ public class Entities {
                     ? ((ListValue) entityValue).getItems().stream().map(Value::getString).collect(Collectors.toList())
                     : Collections.singletonList(entityValue.getString());
             Set<EntityType<? extends Entity>> types = new HashSet<>();
-            descriptors.forEach(s -> types.addAll(EntityValue.getEntityDescriptor(s, ((CarpetContext) c).s.getServer()).typeList));
+            descriptors.forEach(s -> types.addAll(EntityValue.getEntityDescriptor(s, ((CarpetContext) c).s.getServer()).types));
             FunctionArgument funArg = FunctionArgument.findIn(c, expression.module, lv, 1, true, false);
             CarpetEventServer events = ((CarpetScriptHost)c.host).scriptServer().events;
             if (funArg.function == null)