[3.11] gh-104629: Don't skip test_clinic if _testclinic is missing (GH-104630) (#104632)

gh-104629: Don't skip test_clinic if _testclinic is missing (GH-104630)

Just skip the tests that depend on the _testclinic extension module;
we can still run the Python tests.
(cherry picked from commit 86ee49f)

Co-authored-by: Erlend E. Aasland <[email protected]>

Author: miss-islington

Lib/test/test_clinic.py

@@ -829,9 +829,12 @@ def test_external(self):
         self.assertEqual(new_mtime_ns, old_mtime_ns)
 
 
-ac_tester = import_helper.import_module('_testclinic')
-
+try:
+    import _testclinic as ac_tester
+except ImportError:
+    ac_tester = None
 
+@unittest.skipIf(ac_tester is None, "_testclinic is missing")
 class ClinicFunctionalTest(unittest.TestCase):
     locals().update((name, getattr(ac_tester, name))
                     for name in dir(ac_tester) if name.startswith('test_'))