Ensure classpath resource are also filtered

Update `ExtendedGroovyClassLoader` to also filter resources.

Closes gh-14482

Author: philwebb

spring-boot-project/spring-boot-cli/src/main/java/org/springframework/boot/cli/compiler/ExtendedGroovyClassLoader.java

@@ -18,13 +18,15 @@
 
 import java.io.ByteArrayInputStream;
 import java.io.File;
+import java.io.IOException;
 import java.io.InputStream;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLClassLoader;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
 import java.util.ArrayList;
+import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
@@ -230,6 +232,11 @@ private boolean isGroovyJar(String entry) {
 			return false;
 		}
 
+		@Override
+		public Enumeration<URL> getResources(String name) throws IOException {
+			return this.groovyOnlyClassLoader.getResources(name);
+		}
+
 		@Override
 		protected Class<?> loadClass(String name, boolean resolve)
 				throws ClassNotFoundException {