How to configure multiple vector Remote hosts from vector datasource in grafana-pcp web GUI

Issue

• Vector dashboard used to provide option hostspecs field to use it for getting real time data from Remote host.
  But on RHEL 8.2, with Vector as a grafana datasource there is no such hostspec option to get the live data from remote hosts.
• Use the Vector datasource to connect to multiple remote hosts, without configuring a new data source for each host