Fix the xfailing test "test_issue_1192_fmt"

[akx]

I did some digging and we get Hawaii-Aleutian Standard Time instead of GMT-10 here because of this fallback to the long tz name: https://github.com/python-babel/babel/blob/2b93a4a2b8fcc51e530c28a94b55485ad0c0a50e/babel/dates.py#L659-L662 When I get rid of it, get_timezone_gmt is used instead.

Originally posted by @tomasr8 in https://github.com/python-babel/babel/pull/1194#discussion_r1986342759

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We should figure out what the correct formatting is, and then start doing it.