bpo-37267: Do not check for FILE_TYPE_CHAR in os.dup() on Windows (GH-14051) (GH-14140)

On Windows, os.dup() no longer creates an inheritable fd when handling a
character file.
(cherry picked from commit 28fca0c422b425a6be43be31add0a5328c16b0b8)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>
3 files changed