[3.13] gh-123091: Use _Py_IsImmortalLoose() (#123511)

[vstinner]

Use _Py_IsImmortalLoose() in bytesobject.c, typeobject.c and ceval.c.

(cherry picked from commit f1a0d96)

• Issue: Stable ABI: Objects/bytesobject.c:122: PyBytes_FromStringAndSize: Assertion '_Py_IsImmortal(op)' failed. #123091

[vstinner]

@encukou: Would you mind to review this backport to 3.13?

[encukou]

This (probably) doesn't cover all the problematic uses of _Py_IsImmortal, but it's a step in the right direction.

[vstinner]

This (probably) doesn't cover all the problematic uses of _Py_IsImmortal, but it's a step in the right direction.

If tomorrow, more issues will be open about this problem, I would suggest considering to change _Py_IsImmortal() to behave as _Py_IsImmortalLoose(). But for now, I prefer smaller changes by using _Py_IsImmortalLoose() instead.