runners/datetime: check all possible locales when matching query for time specification

... instead of only trying with the system locale's time format, so that e.g. "7:00 PM" will produce a match even when the user's region formats the time as "19:00". This makes sense to have because oftentimes when you'd convert from a remote time zone you'll also have the input time in a remote format.



As a little bonus, this adds a simple way to convert from remote to local time format (eg 12 hour to 24 hour format).


BUG: 466899

Edited by Natalie Clarius

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