test: update function keywords to fat arrows

Updated all the function keywords to fat arrow implementations in
test/parallel/test-event-emitter-no-error-provided-to-error-event.js

PR-URL: https://github.com/nodejs/node/pull/23493


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>