[Feature] Enhance etcd auth configuration

[hanahmily]

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• [X] I had searched in the issues and found no similar feature requirement.

Description

Embed etcd keeps complaining:

simple token is not cryptographically signed

which might relate to its v3 auth design. The solution is to pick up the JWT token which is cryptographically signed.

Use case

No response

Related issues

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Are you willing to submit a PR?

• [ ] Yes I am willing to submit a PR!

Code of Conduct

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