Adding a regression test for an incorrect array hole handling.

Author: iamstolis

graal-js/src/com.oracle.truffle.js.test/js/GR-48544.js

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2023, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Licensed under the Universal Permissive License v 1.0 as shown at http://oss.oracle.com/licenses/upl.
+ */
+
+load("assert.js");
+
+var array = new Array(8);
+array[0] = '1';
+array[2] = 3;
+array.splice(3,0,4,5);
+assertSameContent(['1',,3,4,5,,,,,,], array);