net: introduce net.BlockList

`net.BlockList` provides an object intended to be used by net APIs to
specify rules for disallowing network activity with specific IP
addresses. This commit adds the basic mechanism but does not add the
specific uses.

PR-URL: https://github.com/nodejs/node/pull/34625


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Bradley Farias <bradley.meck@gmail.com>