gh-111201: Skip pyrepl Windows tests earlier

Don't attempt to load pyrepl Windows console if platforms others than
Windows. For example, the import can fail if ctypes is missing.

Lib/test/test_pyrepl/test_windows_console.py

@@ -1,7 +1,11 @@
-import itertools
 import sys
 import unittest
 
+if sys.platform != 'win32':
+    raise unittest.SkipTest("test only relevant on win32")
+
+
+import itertools
 from functools import partial
 from typing import Iterable
 from unittest import TestCase
@@ -23,7 +27,6 @@
     pass
 
 
-@unittest.skipIf(sys.platform != "win32", "Test class specifically for Windows")
 class WindowsConsoleTests(TestCase):
     def console(self, events, **kwargs) -> Console:
         console = WindowsConsole()