src: clean up worker thread creation code

Instead of setting and then in the case of error un-setting properties,
only set them when no error occurs.

Refs: https://github.com/nodejs/node/pull/32344

PR-URL: https://github.com/nodejs/node/pull/32562


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>