[issue42789] Do not skip test_curses on non-tty

[Serhiy Storchaka]

Change by Serhiy Storchaka <storchaka+cpython at gmail.com>:


----------
pull_requests: +22918
pull_request: https://github.com/python/cpython/pull/24085

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42789>
_______________________________________