…tion

This works by not caching the handle and instead getting the handle from
the file descriptor each time, so that if the actual handle changes by
fd redirection closing/opening the console handle beneath our feet, we
will keep working correctly.

I think I also fixed some resource handling issues along the way since
ucrt/msvcrt fds *own* the HANDLEs they use and this module tried to
close them itself.

The change in test_winconsoleio.py is only to avoid the ref leak in
`sys.getwindowsversion`.

…consoleio-fd-redirection

…consoleio-fd-redirection

…consoleio-fd-redirection

…consoleio-fd-redirection

Co-authored-by: Eryk Sun <eryksun@gmail.com>