pythongh-111178: Change Argument Clinic signature for @classmethod (python#131157)

Use "PyObject*", instead of "PyTypeObject*", for `@classmethod`
functions to fix an undefined behavior.

Author: vstinner

Lib/test/clinic.test.c

@@ -5235,14 +5235,14 @@ static PyObject *
 Test_class_method_impl(PyTypeObject *type);
 
 static PyObject *
-Test_class_method(PyTypeObject *type, PyObject *Py_UNUSED(ignored))
+Test_class_method(PyObject *type, PyObject *Py_UNUSED(ignored))
 {
-    return Test_class_method_impl(type);
+    return Test_class_method_impl((PyTypeObject *)type);
 }
 
 static PyObject *
 Test_class_method_impl(PyTypeObject *type)
-/*[clinic end generated code: output=47fb7ecca1abcaaa input=43bc4a0494547b80]*/
+/*[clinic end generated code: output=64f93e6252bde409 input=43bc4a0494547b80]*/
 
 
 /*[clinic input]

Modules/_datetimemodule.c

@@ -3290,8 +3290,8 @@ as local time.
 [clinic start generated code]*/
 
 static PyObject *
-datetime_date_fromtimestamp(PyTypeObject *type, PyObject *timestamp)
-/*[clinic end generated code: output=fd045fda58168869 input=eabb3fe7f40491fe]*/
+datetime_date_fromtimestamp_impl(PyTypeObject *type, PyObject *timestamp)
+/*[clinic end generated code: output=59def4e32c028fb6 input=eabb3fe7f40491fe]*/
 {
     return date_fromtimestamp((PyObject *) type, timestamp);
 }

Modules/_multiprocessing/clinic/semaphore.c.h

@@ -1843,8 +1843,8 @@ Alternative chain() constructor taking a single iterable argument that evaluates
 [clinic start generated code]*/
 
 static PyObject *
-itertools_chain_from_iterable(PyTypeObject *type, PyObject *arg)
-/*[clinic end generated code: output=667ae7a7f7b68654 input=72c39e3a2ca3be85]*/
+itertools_chain_from_iterable_impl(PyTypeObject *type, PyObject *arg)
+/*[clinic end generated code: output=3d7ea7d46b9e43f5 input=72c39e3a2ca3be85]*/
 {
     PyObject *source;
 

Modules/clinic/_datetimemodule.c.h

@@ -2543,8 +2543,8 @@ Example: bytearray.fromhex('B9 01EF') -> bytearray(b'\\xb9\\x01\\xef')
 [clinic start generated code]*/
 
 static PyObject *
-bytearray_fromhex(PyTypeObject *type, PyObject *string)
-/*[clinic end generated code: output=da84dc708e9c4b36 input=7e314e5b2d7ab484]*/
+bytearray_fromhex_impl(PyTypeObject *type, PyObject *string)
+/*[clinic end generated code: output=8f0f0b6d30fb3ba0 input=7e314e5b2d7ab484]*/
 {
     PyObject *result = _PyBytes_FromHex(string, type == &PyByteArray_Type);
     if (type != &PyByteArray_Type && result != NULL) {

Modules/clinic/_zoneinfo.c.h

@@ -2494,8 +2494,8 @@ Example: bytes.fromhex('B9 01EF') -> b'\\xb9\\x01\\xef'.
 [clinic start generated code]*/
 
 static PyObject *
-bytes_fromhex(PyTypeObject *type, PyObject *string)
-/*[clinic end generated code: output=d458ec88195da6b3 input=f37d98ed51088a21]*/
+bytes_fromhex_impl(PyTypeObject *type, PyObject *string)
+/*[clinic end generated code: output=0973acc63661bb2e input=f37d98ed51088a21]*/
 {
     PyObject *result = _PyBytes_FromHex(string, 0);
     if (type != &PyBytes_Type && result != NULL) {