gh-106320: Move _PyMethodWrapper_Type to internal C API

[vstinner]

• Issue: C API: Remove private C API functions (move them to the internal C API) #106320

[pmiloslavsky]

Hi Victor, we were using _PyMethodWrapper_Type in our C extension code, what can we check now?

if (mthd && PyObject_TypeCheck(mthd, &_PyMethodWrapper_Type)) {

[vstinner]

Hi Victor, we were using _PyMethodWrapper_Type in our C extension code, what can we check now?

You can get the type from the Python module types.MethodWrapperType.