events: make eventTarget.removeAllListeners() return this

Fixes: https://github.com/nodejs/node/issues/35762

PR-URL: https://github.com/nodejs/node/pull/35805


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>