inspector: report client-visible host and port

Node instance may not know the real host and port user sees when
debug frontend connects through the SSH tunnel. This change fixes
'/json/list' response by using the value client provided in the host
header.

PR-URL: https://github.com/nodejs/node/pull/19664


Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>