Add getipaddrs (#30349)
* Add getipaddrs
getipaddr would only return the first ip address it would find.
getipaddrs will return all the ip addresses it finds.
* Add getipaddrs to docs
* Update NEWS for `getipaddrs`
* Add Note To `getipaddrs`
Mention that the function is available in Julia 1.2
* Allow `getipaddrs` to Return lo IPs
* Add document on `include_lo`
