test: disable core dumps before running crash test

The test spawns a subprocess with the `--abort-on-uncaught-exception`
flag and expects it to terminate with a SIGABRT signal.

On systems where core dumps are enabled, that actually generates an
unnecessary core dump. Set `ulimit -c 0` before spawning the subprocess.

Fixes: https://github.com/nodejs/node/issues/29286

PR-URL: https://github.com/nodejs/node/pull/29478


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: David Carlier <devnexen@gmail.com>