PR checklist:

• Did you run ClangFormat ?
• Did you separate headers to a different section in existing community code base ?
• Did you surround proton: starts/ends for new code in existing community code base ?

Please write user-readable short description of the changes:
For now, it shares the global listen_host as other public servers. User like to only opens up prometheus to outside and all of other servers are listening on localhost

prometheus:
  listen_host: ...     # <<<<<<<<<<<<< Add this config. If it is not there, fallback to the global one under `node:` section
  asynchronous_metrics: true
  cluster: true
  endpoint: /metrics
  events: true
  external_stream: true
  materialized_view: true
  metrics: true
  port: 9363
  query_info: true
  status_info: true