[3.13] gh-125666: Avoid PyREPL exiting when a null byte is in input (GH-125732) (#126023)

gh-125666: Avoid PyREPL exiting when a null byte is in input (GH-125732)
(cherry picked from commit 44becb8cba677cbfdbcf2f7652277e5e1efc4f20)

Co-authored-by: devdanzin <74280297+devdanzin@users.noreply.github.com>