JS: arrayToString should use toString() instead of direct join to handle nulls properly

#KT-8663 Fixed

libraries/stdlib/test/collections/CollectionTest.kt

@@ -665,5 +665,9 @@ class CollectionTest {
         compare(linkedMapOf(2 to 3), mapOf(2 to 3)) { mapBehavior() }
     }
 
+    test fun toStringTest() {
+        // we need toString() inside pattern because of KT-8666
+        assertEquals("[1, a, null, ${Long.MAX_VALUE.toString()}]", listOf(1, "a", null, Long.MAX_VALUE).toString())
+    }
 }