gh-105751: test_ctypes gets Windows attrs from ctypes (#105758)

gh-105751: test_ctypes gets Windows attrs from ctypes (#105758)

test_ctypes now gets attributes specific to Windows from the ctypes
module, rather than relying on "from ctypes import *".

Attributes:

* ctypes.FormatError
* ctypes.WINFUNCTYPE
* ctypes.WinError
* ctypes.WinDLL
* ctypes.windll
* ctypes.oledll
* ctypes.get_last_error()
* ctypes.set_last_error()