when node crash, kubelet will not update pod status, goldpinger on
crashed node will not work, but other goldpinger instance will continue
ping the bad one.

this patch remove the not ready goldpinger instance from pinger list.

```
NAME                                READY   STATUS        RESTARTS   AGE
goldpinger-8749c476d-5n7lt   1/1     Running       0          78d
goldpinger-8749c476d-bj752   0/1     Terminating   0          78d
goldpinger-8749c476d-bzf6t   1/1     Running       0          78d
goldpinger-8749c476d-dv28g   1/1     Running       0          4h25m
goldpinger-8749c476d-gwhw4   1/1     Running       0          4h25m
goldpinger-8749c476d-prgwd   1/1     Running       0          78d

{
  "conditions": [
    {
      "lastProbeTime": null,
      "lastTransitionTime": "2023-03-29T12:38:40Z",
      "status": "True",
      "type": "Initialized"
    },
    {
      "lastProbeTime": null,
      "lastTransitionTime": "2023-06-16T02:24:10Z",
      "message": "containers with unready status: [goldpinger]",
      "reason": "ContainersNotReady",
      "status": "False",
      "type": "Ready"
    },
    {
      "lastProbeTime": null,
      "lastTransitionTime": "2023-06-16T02:24:10Z",
      "message": "containers with unready status: [goldpinger]",
      "reason": "ContainersNotReady",
      "status": "False",
      "type": "ContainersReady"
    },
    {
      "lastProbeTime": null,
      "lastTransitionTime": "2023-03-29T12:38:39Z",
      "status": "True",
      "type": "PodScheduled"
    }
  ],
  "containerStatuses": [
    {
      "containerID": "docker://xxx",
      "image": "xxx/goldpinger:v3.5.0",
      "imageID": "docker-pullable://xxx/goldpinger@sha256:xxx",
      "lastState": {},
      "name": "goldpinger",
      "ready": false,
      "restartCount": 0,
      "started": true,
      "state": {
        "running": {
          "startedAt": "2023-03-29T12:38:56Z"
        }
      }
    }
  ],
  "hostIP": "1.2.3.3",
  "phase": "Running",
  "podIP": "1.2.3.4",
  "podIPs": [
    {
      "ip": "1.2.3.4"
    }
  ],
  "qosClass": "Burstable",
  "startTime": "2023-03-29T12:38:40Z"
}
```

Signed-off-by: j4ckstraw <[email protected]>

Signed-off-by: j4ckstraw <[email protected]>