gh-116303: Skip tests if C recursion limit is unavailable (GH-117368)

The test suite fetches the C recursion limit from the _testcapi
extension module. Test extension modules can be disabled using the
--disable-test-modules configure option.

Lib/test/test_exceptions.py

@@ -1424,7 +1424,7 @@ class ExceptionTests(unittest.TestCase):
             next(generator)
             recursionlimit = sys.getrecursionlimit()
             try:
-                recurse(support.EXCEEDS_RECURSION_LIMIT)
+                recurse(support.exceeds_recursion_limit())
             finally:
                 sys.setrecursionlimit(recursionlimit)
                 print('Done.')