support valkey compatible behaviour for both cluster shards/nodes

[adiholden]

cluster client apis:
cluster shards returns the status of replica nodes
cluster slots does not return a replica if it did not finished loading

To support this changes we need the following changes:

1. add to cluster config change to add replica state
2. cluster manager update the replica state on the config command, it should pull the state from the replica and once it updated it should run the cluster config command
3. update the responce for the cluster shards/ cluster slots/ cluster nodes commands