http: expose host and protocol on ClientRequest

Allow host and protocol to be inspected.

PR-URL: https://github.com/nodejs/node/pull/33803
Fixes: https://github.com/nodejs/node/issues/2461


Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>