Move test to a more sensible location

Also, use a more sensible ID as well. Add another test (for
Date values).

test/intl402/Temporal/Instant/formatrange-fails.js → test/intl402/DateTimeFormat/formatRange/fails-on-distinct-temporal-types.js

@@ -2,15 +2,16 @@
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
-esid: sec-temporal.instant
-description: formatRange fails if given arguments of different types
+esid: sec-intl.datetimeformat.prototype.formatRange
+description: formatRange fails if given arguments of different Temporal types
 features: [Temporal]
 ---*/
 
 const us = new Intl.DateTimeFormat('en-US');
 
 const instances = {
   instant: new Temporal.Instant(0n),
+  number: new Date.UTC(2000, 5, 2),
   plaindate: new Temporal.PlainDate(2000, 5, 2),
   plaindatetime: new Temporal.PlainDateTime(2000, 5, 2, 12, 34, 56, 987, 654, 321),
   plainmonthday: new Temporal.PlainMonthDay(5, 2),