Control Panel Add Rest API?

[RyouZhang]

I want to force sync the control-panel with the meta-store, so should we add API to do it?

Our architecture is very special, we have two single-region clusters with one rds, so when we call API to add an index, and source in cluster A, we must restart control-panel on cluster B.

This is another issue: when multi-cluster connects one database if the indexer has the same name, the slice merge will be confused because the slice table can't have cluster_id