[3.14] gh-146056: Fix repr() for lists and tuples containing NULLs (GH-146129) (GH-146155)

(cherry picked from commit 0f2246b1553f401da5ade47e0fd1c80ad7a8dfa5)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Victor Stinner <vstinner@python.org>