refactor: create a cluster api request structure

[itnpeople]

• API 구조 변경 'create a cluster', 'add nodes'

• ISSUE #151

• create a cluster

  {
  "config": {
  "installMonAgent": "no",
  "kubernetes": {
    "version": "1.23.13",
    "networkCni": "canal",
    "loadbalancer": "haproxy",
    "podCidr": "10.244.0.0/16",
    "serviceCidr": "10.96.0.0/12",
    "serviceDnsDomain": "cluster.local",
    "storageclass": {
      "nfs": {
        "path": "/nfs/data",
        "server": "163.154.154.89"
      }
    },
  }
  },
  "controlPlane": [
  {
    "connection": "config-aws-ap-northeast-2",
    "count": 3,
    "spec": "t2.medium",
    "rootDisk":  {
      "type": "default",
      "size": "default"
    }
  }
  ],
  "description": "string",
  "label": "string",
  "name": "cluster-01",
  "worker": [
  {
    "connection": "config-aws-ap-northeast-2",
    "count": 3,
    "spec": "t2.medium",
    "rootDisk":  {
      "type": "default",
      "size": "default"
    }
  }
  ]
  }

• add nodes

  {
  "worker": [
  {
    "connection": "config-aws-ap-northeast-2",
    "count": 3,
    "spec": "t2.medium",
    "rootDisk":  {
      "type": "default",
      "size": "default"
    }
  }
  ]
  }