[BUG] kubeblocks helm upgrade-hook-job failed

[juchaosong]

Describe the bug
helm upgrade failed.

To Reproduce
After install kubeblocks using helm with version 0.9.2, the upgrade-hook-job will stuck with pre-upgrade-job container panic.

Additional context
The helm logs:

middleware, kubeblock-upgrade-hook-job, Job (batch) has been added:
- 
+ # Source: kubeblocks/templates/kubeblocks-upgrade-hook.yaml
+ apiVersion: batch/v1
+ kind: Job
+ metadata:
+   name: kubeblock-upgrade-hook-job
+   labels:
+     helm.sh/chart: kubeblocks-0.9.2
+     app.kubernetes.io/name: kubeblocks
+     app.kubernetes.io/instance: kubeblock
+     app.kubernetes.io/version: "0.9.2"
+     app.kubernetes.io/managed-by: Helm
+   annotations:
+     "helm.sh/hook": pre-upgrade
+     "helm.sh/hook-delete-policy": "before-hook-creation,hook-succeeded"
+ spec:
+   ttlSecondsAfterFinished: 3600
+   template:
+     metadata:
+       name: kubeblock-upgrade
+       labels:
+         helm.sh/chart: kubeblocks-0.9.2
+         app.kubernetes.io/name: kubeblocks
+         app.kubernetes.io/instance: kubeblock
+         app.kubernetes.io/version: "0.9.2"
+         app.kubernetes.io/managed-by: Helm
+     spec:
+       serviceAccountName: kubeblock-kubeblocks
+       securityContext:
+         runAsNonRoot: true
+       restartPolicy: OnFailure
+       containers:
+         - name: pre-upgrade-job
+           image: "apecloud-registry.cn-zhangjiakou.cr.aliyuncs.com/apecloud/kubeblocks-tools:0.9.2"
+           imagePullPolicy: IfNotPresent
+           command:
+             - /bin/helm_hook
+           args:
+             - --version=0.9.2
+             - --namespace=middleware
+         - name: delete-ops
+           image: "apecloud-registry.cn-zhangjiakou.cr.aliyuncs.com/apecloud/kubeblocks-tools:0.9.2"
+           imagePullPolicy: IfNotPresent
+           command:
+             - sh
+             - -c
+             - |
+               opsDefs=$(kubectl get opsdefinitions.apps.kubeblocks.io | awk 'NR>1 {print $1}')
+               for opsDef in ${opsDefs}; do
+                 if [ $(kubectl get opsdefinitions.apps.kubeblocks.io ${opsDef} -oyaml | grep "  jobSpec:") ]; then
+                   kubectl patch opsdefinitions.apps.kubeblocks.io ${opsDef} -p '{"metadata":{"finalizers":null}}' --type=merge
+                   kubectl delete opsdefinitions.apps.kubeblocks.io ${opsDef}
+                 elif [ ! $(kubectl get opsdefinitions.apps.kubeblocks.io ${opsDef} -oyaml | grep "  actions:") ]; then
+                   kubectl patch opsdefinitions.apps.kubeblocks.io ${opsDef} --type=merge -p '{"spec":{"actions":[{"name":"mock","exec":{"podInfoExtractorName":"test","command":["echo 1"]}}]}}'
+                 fi
+               done
+       affinity:
+         nodeAffinity:
+           preferredDuringSchedulingIgnoredDuringExecution:
+           - preference:
+               matchExpressions:
+               - key: kb-controller
+                 operator: In
+                 values:
+                 - "true"
+             weight: 100
+       tolerations:
+         - effect: NoSchedule
+           key: kb-controller
+           operator: Equal
+           value: "true"

The pod logs:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0xb0 pc=0x16fe31c]

goroutine 1 [running]:
github.com/apecloud/kubeblocks/cmd/helmhook/hook.getVersionInfo({0x1dddf80?, 0xc00012c900?}, 0x18?, {0x7fffcf0b993a?, 0xc000497db8?})
 /src/cmd/helmhook/hook/prepare.go:41 +0x3c
github.com/apecloud/kubeblocks/cmd/helmhook/hook.PrepareFor(0xc00012c900)
 /src/cmd/helmhook/hook/prepare.go:29 +0x32
github.com/apecloud/kubeblocks/cmd/helmhook/hook.Workflow.Do(...)
 /src/cmd/helmhook/hook/types.go:100
main.main()
 /src/cmd/helmhook/main.go:80 +0x630

[shanshanying]

@sophon-zt PTAL