gh-117142: ctypes: Migrate global vars to module state

Modules/_ctypes/_ctypes.c

@@ -1972,7 +1972,6 @@ static PyObject *CreateSwappedType(ctypes_state *st, PyTypeObject *type,
     PyObject *name = PyTuple_GET_ITEM(args, 0);
     PyObject *newname;
     PyObject *swapped_args;
-    static PyObject *suffix;
     Py_ssize_t i;
 
     swapped_args = PyTuple_New(PyTuple_GET_SIZE(args));

Modules/_ctypes/callproc.c

@@ -2022,7 +2022,7 @@ create_pointer_inst(PyObject *module, PyObject *arg)
         return NULL;
     }
     if (typ == NULL) {
-        typ = create_pointer_type(NULL, (PyObject *)Py_TYPE(arg));
+        typ = create_pointer_type(module, (PyObject *)Py_TYPE(arg));
         if (typ == NULL)
             return NULL;
     }