[Improvement] don't depend on github.com/vmware-tanzu/velero

[zjx20]

Is your improvement request related to a problem? Please describe.
It's only used in the code of the E2E test but will introduce many unwanted dependencies for KubeBlocks (such as aws-sdk-go).

If this is a new function, please describe the motivation and goals.
A clear and concise description of why you want to happen, link the design doc if possible

Describe the solution you'd like
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Describe alternatives you've considered
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Additional context
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