bpo-42519: Replace PyObject_MALLOC() with PyObject_Malloc() (GH-23587)

No longer use deprecated aliases to functions:

* Replace PyObject_MALLOC() with PyObject_Malloc()
* Replace PyObject_REALLOC() with PyObject_Realloc()
* Replace PyObject_FREE() with PyObject_Free()
* Replace PyObject_Del() with PyObject_Free()
* Replace PyObject_DEL() with PyObject_Free()

Modules/_curses_panel.c

@@ -282,7 +282,7 @@ PyCursesPanel_Dealloc(PyCursesPanelObject *po)
         Py_DECREF(po->wo);
         remove_lop(po);
     }
-    PyObject_DEL(po);
+    PyObject_Free(po);
     Py_DECREF(tp);
 }