net: partially revert "simplify Socket.prototype._final"

Partially revert b7e6ccd0
because it broke a test that was added since its last CI run.

Refs: https://github.com/nodejs/node/pull/24075
Refs: https://github.com/nodejs/node/pull/23866

PR-URL: https://github.com/nodejs/node/pull/24288


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>