[3.13] pythongh-133210: Fix test_descr in --without-doc-strings mode (pythonGH-133294) (python#133298)

pythongh-133210: Fix `test_descr` in `--without-doc-strings` mode (pythonGH-133294)
(cherry picked from commit ba16ba3)

Co-authored-by: sobolevn <mail@sobolevn.me>

Author: miss-islington

Lib/test/test_descr.py

@@ -1588,7 +1588,7 @@ def f(cls, arg):
         cm_dict = {'__annotations__': {},
                    '__doc__': (
                        "f docstring"
-                       if support.HAVE_DOCSTRINGS
+                       if support.HAVE_PY_DOCSTRINGS
                        else None
                     ),
                    '__module__': __name__,