deepflow-server access the evolution of all ClickHouse databases

[Nick-0314]

deepflow-server accesses all clickhouse databases using DNS SRV instead of using all data nodes IP in the database :NodePort list

For follow-up DNS SRV query, use clusterIP=None

The current scenario that uses all data nodes in the database :NodePort list uses externalTrafficPolicy=local

Example:

# dig srv _querier._tcp.querier.metaflow.svc.cluster.local. +short
0 33 30416 192-168-1-1.querier.metaflow.svc.cluster.local.
0 33 30416 192-168-1-2.querier.metaflow.svc.cluster.local.
0 33 30416 192-168-1-3.querier.metaflow.svc.cluster.local.