tty: support printing msys2 tty path

[ChrisDenton]

If we know we have a terminal handle then we can try printing its file name. If that fails then fallback to the default.

[oech3]

This PR is useful when tty.exe is built for native Windows target, but working on MSYS2. Right?

[ChrisDenton]

Yes, that's the idea. Which is one of the reasons rust's standard library supports detecting msys2 terminals even on the native targets.

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/date/date-locale-hour (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/tail/tail-n0f (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/cut/bounded-memory is now passing!
Congrats! The gnu test tests/printf/printf-surprise is now passing!

[ChrisDenton]

Would you leave URL to the code for the case switching to std easier in the future?

Done.

https://github.com/uutils/coreutils/blob/main/.vscode/cspell.dictionaries/acronyms%2Bnames.wordlist.txt

Oh I added an ignore to the top of the file. But adding it to the word list does seem better because this is unlikely to be the only place it's used.