FF149 Intl.DateTimeFormat supports islamic-umalqura calendar

[hamishwillee]

FF140 adds support for islamic-umalqura calendar in https://bugzilla.mozilla.org/show_bug.cgi?id=2011505. That means the option will appear in Intl.supportedValuesOf for the calendar option (console.log(Intl.supportedValuesOf("calendar"));) and can be used in the DataTimeFormat constructor like this:

const date = new Date();

const umAlQuraFormatter = new Intl.DateTimeFormat('en-u-ca-islamic-umalqura', {
  calendar: 'islamic-umalqura',
  dateStyle: 'full'
});

console.log(umAlQuraFormatter.format(date));

This PR is created to test whether BCD team wants to track support for languages and the other options - if you don't we can close this.
It updates the DataTimeFormat constructor to indicate the value is supported. Note that I didn't update supportedValuesOf() because it is not a compatibility break to not support the value there.

I tested on chrome and Safari for the other versions in browserstack.

Related docs work can be tracked in mdn/content#43203

[github-actions]

Tip: Review these changes grouped by change (recommended for most PRs), or grouped by feature (for large PRs).

[caugner]

This PR is created to test whether BCD team wants to track support for languages and the other options - if you don't we can close this.

I would say we can track this only if there are collector tests in place.