test: adapt test-repl to V8 9.5

Syntax errors for RegExp literals now show hint to error location.

PR-URL: https://github.com/nodejs/node/pull/40178


Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>