repl: fix tab-complete warning

When create a nest repl, will register `Runtime.executionContextCreated`
listener to the inspector session.This patch will fix listener
repeatedly register.

PR-URL: https://github.com/nodejs/node/pull/18881
Fixes: https://github.com/nodejs/node/issues/18284


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>