[FEATURE] Separate the principal and keytab used for ZooKeeper authentication between the service and the engine.

[LamiumAmplexicaule]

Code of Conduct

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• I have searched in the issues and found no similar issues.

Describe the feature

We can use different principal and keytab for the engine and the service to authenticate to ZooKeeper.

Motivation

The engine and the service are separate components, so their authentication principal and keytab should also be separated.

Describe the solution

Add principal and keytab configurations for the engine, and switch the principal and keytab used by the engine discovery service from the service to the engine.

Additional context

No response

Are you willing to submit PR?

• Yes. I would be willing to submit a PR with guidance from the Kyuubi community to improve.
• No. I cannot submit a PR at this time.

[github-actions]

Hello @LamiumAmplexicaule,
Thanks for finding the time to report the issue!
We really appreciate the community's efforts to improve Apache Kyuubi.