[Cluster] add support of AutoCluster config

[AntyaDev]

{
    "ClusterSettings": {
        "AutoCluster": {
            "ClusterId": "test_cluster",
            "NATSServerURL": "nats://localhost",

            "Coordinator": {
                "TargetScenarios": ["test_scenario"]
            },

            "Agent": {
                "TargetScenarios": ["test_scenario"],
                "AgentsCount": 1
            }
        }
    }
}

• How to run cluster
• AutoCluster