Use Kyiv instead of Kiev in test_email

[jspricke]

Bug report

Bug description:

As proposed in #108533 the time zone was renamed but we can't simply rename it in the test cause it fails on old(?) MacOS systems. I would propose to prepend it with:

@unittest.skipUnless(os.path.exists('/usr/share/zoneinfo/Europe/Kyiv') or
                         os.path.exists('/usr/lib/zoneinfo/Europe/Kyiv'),
                         "Can't find the Olson's TZ database")

CPython versions tested on:

3.11

Operating systems tested on:

Linux

Linked PRs

• gh-109017: Use non alternate name for Kyiv #109251
• [3.11] gh-109017: Use non alternate name for Kyiv (GH-109251) #111279
• [3.12] gh-109017: Use non alternate name for Kyiv (GH-109251) #111280

[corona10]

@serhiy-storchaka Would you like to take a look since you are the Ukranian?

[serhiy-storchaka]

I do not like relying on the particular location of the database. Although it was already here in the existing code, the comment notes that it is not a robust way. Now we have zoneinfo in the stdlib, so perhaps it could be used.

[jspricke]

@serhiy-storchaka thanks for the proposal, I've updated my PR.