skip exit_on_error* tests to fix 3.13 test failures

Skip `exit_on_error*` tests from `test.test_argparse` to avoid test
failures on Python 3.13.  The `exit_on_error=False` semantics
is not supported by ConfigArgParse at the moment.

tests/test_configargparse.py

@@ -1533,7 +1533,8 @@ def testYAMLConfigFileParser_w_ArgumentParser_parsed_values(self):
     test_argparse_source_code = test_argparse_source_code.replace(
         'argparse.ArgumentParser', 'configargparse.ArgumentParser').replace(
         'TestHelpFormattingMetaclass', '_TestHelpFormattingMetaclass').replace(
-        'test_main', '_test_main')
+        'test_main', '_test_main').replace(
+        'test_exit_on_error', '_test_exit_on_error')
 
     # pytest tries to collect tests from TestHelpFormattingMetaclass, and
     # test_main, and raises a warning when it finds it's not a test class