When a new built-in type is introduced,_Py_MAX_MANAGED_STATIC_BUILTIN_TYPES needs to be updated accordingly.
(e.g.,3e2f5c1,#145496 (comment))

This is quite painful, and sometimes we even forget to adjust it. To prevent this kind of issue, we may need a way to update it automatically, or add a test that verifies it is set correctly.

cc@markshannon@Fidget-Spinner@vstinner