fs: cleanup fd lchown and lchownSync

lchown and lchownSync were opening file descriptors without
closing them. Looks like it has been that way for 7 years.
Does anyone actually use these functions?

PR-URL: https://github.com/nodejs/node/pull/18329


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>