This simplifies the proxy configuration handling code,
adds tests to make sure the proxy support works with IPv6
and throws correct errors for invalid proxy IPs.
Drive-by: remove useless properties from ProxyConfig
PR-URL: https://github.com/nodejs/node/pull/59894
Refs: https://github.com/nodejs/node/issues/57872
Reviewed-By: Aditi Singh <aditisingh1400@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
