[Bugfix] Do not create the default data storage volume when deploying be with multiple volumes

[yandongxiao]

Description

Please provide a detailed description of the changes you have made. Include the motivation for these changes, and any
additional context that may be important.

the PR should include helm chart changes and operator changes.

Related Issue(s)

#611

If this PR is included:

  volumes:
  - name: be1-data
    persistentVolumeClaim:
      claimName: be1-data-kube-starrocks-be-0
  - name: be-log
    persistentVolumeClaim:
      claimName: be-log-kube-starrocks-be-0
  - name: be0-data
    persistentVolumeClaim:
      claimName: be0-data-kube-starrocks-be-0
  - configMap:
      defaultMode: 420
      name: kube-starrocks-be-cm
    name: kube-starrocks-be-cm

Checklist

For operator, please complete the following checklist:

• run make generate to generate the code.
• run golangci-lint run to check the code style.
• run make test to run UT.
• run make manifests to update the yaml files of CRD.