[Intl][Validator] Handle alias locales/timezones #31354
Merged
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both timezones and locales have aliases (either thru deprecation/migration/etc.)
for locales we compile a mapping, for timezones we dont. yet we can benefit partial alias support thru DateTimeZone, which knows about most timezone IDs already.
both the timezone + locale validator already support aliases. Connsequently, we should support aliases in
Timezones::exists()
+Locales::exists()
as well IMHO.so far so good; the catch is; with this PR
Locales::getName()
supports aliases, whereasTimezones::getName()
doesnt. I think it's reasonable for now, until we compile the timezone mapping so we can widen the timezone ID conversion here.