bpo-40910: PyConfig_Clear() clears _orig_argv (GH-20886)

bpo-40910, bpo-40953: PyConfig_Clear() clears _orig_argv.
(cherry picked from commit e2d47a0)

Co-authored-by: Victor Stinner <[email protected]>

Author: miss-islington

Python/initconfig.c

@@ -601,6 +601,8 @@ PyConfig_Clear(PyConfig *config)
     CLEAR(config->run_module);
     CLEAR(config->run_filename);
     CLEAR(config->check_hash_pycs_mode);
+
+    _PyWideStringList_Clear(&config->_orig_argv);
 #undef CLEAR
 }