gh-43414: os.get_terminal_size() should use file descriptors in Windows

[raghunandanbhat]

Modified os.get_terminal_size() to use _get_osfhandle(fd) instead of using hardcoded process standard handles in Windows.
Fixes 43414

• Issue: Install under osx 10.4.6 breaks shell. #43414

[ghost]

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[eryksun]

It would be nice to add a test in TermsizeTests in "Lib/test/test_os.py". For example:

    @unittest.skipUnless(sys.platform == 'win32', 'Windows specific test')
    def test_windows_fd(self):
        # gh-87580: support arbitrary file descriptors
        try:
            conout = open('conout$', 'w')
        except OSError:
            self.skipTest('failed to open conout$')
        with conout:
            size = os.get_terminal_size(conout.fileno())

        self.assertGreaterEqual(size.columns, 0)
        self.assertGreaterEqual(size.lines, 0)

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