test: increase execFile abort coverage

Verify that if something different than Abortcontroller.signal is passed
to child_process.execFile(), ERR_INVALID_ARG_TYPE is thrown.

PR-URL: https://github.com/nodejs/node/pull/36429


Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>