test: fix flaky test-repl

The timeout is insufficient in CI (failures on Raspberry Pi) and I can
reproduce locally (on macOS) with
`tools/test.py -j 96 --repeat 192 test-repl`.

Increase timeout drastically as it only is useful in an error
condition.

PR-URL: https://github.com/nodejs/node/pull/36415


Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>
Reviewed-By: James M Snell <jasnell@gmail.com>