feat: add vault non-root support

[urfreespace]

https://github.com/streamnative/charts/issues/840

Add vault non-root user vault (100:1000) support

vault:
  replicaCount: 1
  securityContext:  
    runAsUser: 100
    runAsGroup: 1000
    supplementalGroups: [100]
    fsGroup: 1000

images:
  vault_init:
    repository: urfreespace/pulsar_vault_init
    tag: "non-root-4"

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[urfreespace]

Our vault-init image is based on the office vault image, and just added kubectl in, for now, it can meet the requirement

[maxsxu]

Our vault-init image is based on the office vault image, and just added kubectl in, for now, it can meet the requirement

What does the kubectl inside this vault image used for? @urfreespace

[urfreespace]

Our vault-init image is based on the office vault image, and just added kubectl in, for now, it can meet the requirement

What does the kubectl inside this vault image used for? @urfreespace

manage the relationship between vault super-token and the secret, I think, maybe @tuteng could know more

[tuteng]

@fantapsody PTAL