Updated list of InfluxDB queries/config
Considering this requires work on the user's end (should they want to use this new setup), do we want to include these docs in 8.7 or 8.8? Since these changes are purely on InfluxDB's end if a user does nothing their existing dashboards will continue to work. However, should they ever update their dashboards as per https://gitlab.com/gitlab-org/grafana-dashboards/ they'll also need the queries mentioned in this MR.