[3.8] bpo-38588: Fix possible crashes in dict and list when calling P… (GH-17764)

[3.8] bpo-38588: Fix possible crashes in dict and list when calling P… (GH-17764)

* [3.8] bpo-38588: Fix possible crashes in dict and list when calling PyObject_RichCompareBool (GH-17734)

Take strong references before calling PyObject_RichCompareBool to protect against the case
where the object dies during the call.
(cherry picked from commit 2d5bf568eaa5059402ccce9ba5a366986ba27c8a)

Co-authored-by: Dong-hee Na <donghee.na92@gmail.com>
* Update Objects/listobject.c

@methane's suggestion

Co-Authored-By: Inada Naoki <songofacandy@gmail.com>
Co-authored-by: Inada Naoki <songofacandy@gmail.com>