bpo-36922: use Py_TPFLAGS_METHOD_DESCRIPTOR in lookup_maybe_method() (GH-13865)

(cherry picked from commit 2e9954d3472a23919b96323fcd5bb6c1d6927155)

Co-authored-by: Jeroen Demeyer <J.Demeyer@UGent.be>
3 files changed