process: stub unsupported worker methods

Some process methods are not supported in workers. This commit
adds stubs that throw more informative errors.

PR-URL: https://github.com/nodejs/node/pull/25587
Fixes: https://github.com/nodejs/node/issues/25448


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>