bpo-39573: Use Py_TYPE() macro in Objects directory (GH-18392)

Replace direct access to PyObject.ob_type with Py_TYPE().

Objects/interpreteridobject.c

@@ -56,7 +56,7 @@ interp_id_converter(PyObject *arg, void *ptr)
     else {
         PyErr_Format(PyExc_TypeError,
                      "interpreter ID must be an int, got %.100s",
-                     arg->ob_type->tp_name);
+                     Py_TYPE(arg)->tp_name);
         return 0;
     }
     *(int64_t *)ptr = id;