[fix] nil status panic

[ls-2018]

apiVersion: apps.kruise.io/v1alpha1
kind: PodProbeMarker
metadata:
  name: game-server-probe
spec:
  selector:
    matchLabels:
      app: game-server-probe
  probes:
  - name: Idle
    containerName: game-server
    probe:
      exec:
        command:
        - telnet 127.0.0.1 8080
      initialDelaySeconds: 10
      timeoutSeconds: 3
      periodSeconds: 10
      successThreshold: 1
      failureThreshold: 3
    markerPolicy:
    - state: Succeeded
      labels:
        gameserver-idle: 'true'
      annotations:
        controller.kubernetes.io/pod-deletion-cost: '-10'
    - state: Failed
      labels:
        gameserver-idle: 'false'
      annotations:
        controller.kubernetes.io/pod-deletion-cost: '10'
    podConditionType: game.io/idle
---
apiVersion: v1
kind: Pod
metadata:
  name: game-server-probe
  labels:
    app: game-server-probe
spec:
  containers:
  - name: game-server-probe
    image: centos:7
    command:
    - "/bin/sh"
    - "-c"
    - "sleep 1d"
    imagePullPolicy: IfNotPresent
  restartPolicy: Always

The cluster does not have the image.
Both containerStatus and err are nil

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[codecov-commenter]

Codecov Report

Merging #1432 (8104a4f) into master (81b5d52) will decrease coverage by 0.06%.
The diff coverage is 0.00%.

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@@            Coverage Diff             @@
##           master    #1432      +/-   ##
==========================================
- Coverage   48.27%   48.22%   -0.06%     
==========================================
  Files         153      153              
  Lines       21493    21497       +4     
==========================================
- Hits        10376    10366      -10     
- Misses       9979     9991      +12     
- Partials     1138     1140       +2     

Flag	Coverage Δ
unittests	48.22% <0.00%> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
pkg/daemon/podprobe/pod_probe_controller.go	41.31% <0.00%> (-0.59%)	⬇️

... and 2 files with indirect coverage changes

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[zmberg]

@ls-2018 What version of the kruise?

[zmberg]

@ls-2018 We already consider this situation.