users need to know the latest configuration of cluster by REST API
- need to get a basis to next updates
- need to get a configuration of 1 cluster and apply this configuration to next cluster, for promote or demote from DEV/TEST/PROD to DEV/TEST/PROD
an endpoint for users to get latest configuration in cluster: [GET] `/management/v1/configurations`
similar behavior as "GFSH export cluster-configuration"