gh-111178: Change Argument Clinic signature for @staticmethod (#131157) (#131159)

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

Author: vstinner

Lib/test/clinic.test.c

@@ -5262,14 +5262,14 @@ static PyObject *
 Test_static_method_impl();
 
 static PyObject *
-Test_static_method(void *null, PyObject *Py_UNUSED(ignored))
+Test_static_method(PyObject *null, PyObject *Py_UNUSED(ignored))
 {
     return Test_static_method_impl();
 }
 
 static PyObject *
 Test_static_method_impl()
-/*[clinic end generated code: output=82524a63025cf7ab input=dae892fac55ae72b]*/
+/*[clinic end generated code: output=9e401fb6ed56a4f3 input=dae892fac55ae72b]*/
 
 
 /*[clinic input]

Objects/clinic/bytearrayobject.c.h

@@ -1115,7 +1115,10 @@ def correct_name_for_self(
             return "PyObject *", "self"
         return "PyObject *", "module"
     if f.kind is STATIC_METHOD:
-        return "void *", "null"
+        if parser:
+            return "PyObject *", "null"
+        else:
+            return "void *", "null"
     if f.kind == CLASS_METHOD:
         if parser:
             return "PyObject *", "type"