net: migrate errors to internal/errors

Throw ERR_SOCKET_CLOSED and ERR_SERVER_NOT_RUNNING
instead of the old-style errors in net.js.

PR-URL: https://github.com/nodejs/node/pull/17766
Refs: https://github.com/nodejs/node/issues/17709


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>