Add tests for DurationFormat PR 172 and 167

Test the order of resolvedOptions in default setting
Also add test to check the reading order of options based on the
property returned in the default setting resolvedOptions.

tc39/proposal-intl-duration-format#167
tc39/proposal-intl-duration-format#172
https://tc39.es/proposal-intl-duration-format/#sec-Intl.DurationFormat.prototype.resolvedOptions

These two PRs are presenting to TC39 2023-09 meeting

Author: FrankYFTang

test/intl402/DurationFormat/constructor-option-read-order.js

@@ -0,0 +1,46 @@
+/// Copyright 2023 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-Intl.DurationFormat
+description: Checks the order of option read.
+features: [Intl.DurationFormat]
+---*/
+
+let optionKeys =  Object.keys((new Intl.DurationFormat()).resolvedOptions());
+let opt = {};
+let readKeys = new Array();
+// For each item returned by resolvedOptions of default, add a getter
+// to track the reading order.
+optionKeys.forEach((property) =>
+    Object.defineProperty(opt, property, {
+        get() {
+            readKeys[readKeys.length] = property;
+            return undefined;
+        },
+    }));
+let p = new Intl.DurationFormat(undefined, opt);
+assert.sameValue(
+    'numberingSystem,' +
+    'style,' +
+    'years,' +
+    'yearsDisplay,' +
+    'months,' +
+    'monthsDisplay,' +
+    'weeks,' +
+    'weeksDisplay,' +
+    'days,' +
+    'daysDisplay,' +
+    'hours,' +
+    'hoursDisplay,' +
+    'minutes,' +
+    'minutesDisplay,' +
+    'seconds,' +
+    'secondsDisplay,' +
+    'milliseconds,' +
+    'millisecondsDisplay,' +
+    'microseconds,' +
+    'microsecondsDisplay,' +
+    'nanoseconds,' +
+    'nanosecondsDisplay',
+    readKeys.toString());

test/intl402/DurationFormat/prototype/resolvedOptions/return-keys-order-default.js

@@ -0,0 +1,33 @@
+// Copyright 2023 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-intl.durationformat.prototype.resolvedoptions
+description: order of property keys for the object returned by resolvedOptions()
+features: [Intl.DurationFormat]
+---*/
+
+assert.sameValue(
+    'locale,' +
+    'numberingSystem,' +
+    'style,' +
+    'years,' +
+    'yearsDisplay,' +
+    'months,' +
+    'monthsDisplay,' +
+    'weeks,' +
+    'weeksDisplay,' +
+    'days,' +
+    'daysDisplay,' +
+    'hours,' +
+    'hoursDisplay,' +
+    'minutes,' +
+    'minutesDisplay,' +
+    'seconds,' +
+    'secondsDisplay,' +
+    'milliseconds,' +
+    'millisecondsDisplay,' +
+    'microseconds,' +
+    'microsecondsDisplay,' +
+    'nanoseconds,' +
+    'nanosecondsDisplay',
+    Object.keys((new Intl.DurationFormat()).resolvedOptions()).toString());