[3.14] gh-133467: fix data race in `type_set_name` (GH-137302) (#137303)

gh-133467: fix data race in `type_set_name` (GH-137302)

Fix data race in `type_set_name` by assigning name under stop the world pause making it thread safe in free-threading.
(cherry picked from commit e99bc7fd44bbbf2464c37d5a57777ac0e1264c37)

Co-authored-by: Kumar Aditya <kumaraditya@python.org>