LibJS: Alphabetically sort the collations returned by CollationsOfLocale

This is a normative change in the Intl Locale Info proposal. See:
https://github.com/tc39/proposal-intl-locale-info/commit/171d3ad

Note this doesn't affect us because we don't have collation info from
the CLDR; we just return ["default"] here.

Userland/Libraries/LibJS/Runtime/Intl/Locale.cpp

@@ -102,7 +102,7 @@ Array* collations_of_locale(VM& vm, Locale const& locale_object)
     // 3. Assert: locale matches the unicode_locale_id production.
     VERIFY(::Locale::parse_unicode_locale_id(locale).has_value());
 
-    // 4. Let list be a List of 1 or more unique canonical collation identifiers, which must be lower case String values conforming to the type sequence from UTS 35 Unicode Locale Identifier, section 3.2, sorted in descending preference of those in common use for string comparison in locale. The values "standard" and "search" must be excluded from list.
+    // 4. Let list be a List of 1 or more unique canonical collation identifiers, which must be lower case String values conforming to the type sequence from UTS 35 Unicode Locale Identifier, section 3.2, ordered as if an Array of the same values had been sorted, using %Array.prototype.sort% using undefined as comparefn, of those in common use for string comparison in locale. The values "standard" and "search" must be excluded from list.
     auto list = ::Locale::get_keywords_for_locale(locale, "co"sv);
 
     // 5. Return ! CreateArrayFromListOrRestricted( list, restricted ).