SPIGOT-7051: Worldgen API does not run vanilla noise generation when shouldGenerateNoise is true

By: DerFrZocker <derrieple@gmail.com>

paper-server/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java

@@ -92,6 +92,10 @@ public class CustomChunkGenerator extends InternalChunkGenerator {
         this.generator = generator;
     }
 
+    public net.minecraft.world.level.chunk.ChunkGenerator getDelegate() {
+        return delegate;
+    }
+
     private static SeededRandom getSeededRandom() {
         return new SeededRandom(new LegacyRandomSource(0));
     }