gh-132888: Fix Windows API error checking in pyrepl.windows_console

[aisk]

• Issue: Wrong use of ctypes.GetLastError() in windows_console.py #132888

[chris-eibl]

GetStdHandle can return INVALID_HANDLE_VALUE and should be checked, too?

[chris-eibl]

In general this lgtm. I've built locally and did a few very basic manual tests like redirecting stdout / stderr.
The changes where raise WinError(GetLastError()) are replaced with raise WinError(get_last_error()) are definitely ok, because we've also raised before and now won't just show the misleading

OSError: [WinError 0] The operation completed successfully.

anymore (#132962 (comment)).

But turning the silent swallowing into raising exceptions might bite us (although most probably the right thing to do), like you've seen in the failing tests in headless mode.

Most probably the swallowing just let another error surface slightly later, anyway, so I think it is ok to fail early and loud?