[3.11] gh-104242: Enable test_is_char_device_true in pathlib test on all platform (GH-116983) (GH-117277) (GH-117280)

(cherry picked from commit 17a82a1d16a46b6c008240bcc698619419ce5554)
(cherry picked from commit af1b0e94400d1bf732466d675054df8cf7dfb62d)

Co-authored-by: AN Long <aisk@users.noreply.github.com>