[3.13] gh-119034, REPL: Change page up/down keys to search in history (GH-123607) (GH-123773)

Change <page up> and <page down> keys of the Python REPL to history
search forward/backward.

(cherry picked from commit 8311b11800509c975023e062e2c336f417c5e4c0)

Co-authored-by: Victor Stinner <vstinner@python.org>
Co-authored-by: Łukasz Langa <lukasz@langa.pl>