pythongh-138756: Fix leak of inittab memory in PyInitConfig_Free() (pythonGH-138792)

(cherry picked from commit 3d521a6)

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

Author: vstinner

Python/initconfig.c

@@ -3729,6 +3729,7 @@ PyInitConfig_Free(PyInitConfig *config)
     }
 
     initconfig_free_config(&config->config);
+    PyMem_RawFree(config->inittab);
     free(config->err_msg);
     free(config);
 }