[K8S][HELM]Save ETCD certificate in a Kubernetes Secret

[zhaohehuhu]

Why are the changes needed?

To save ETCD certificates in a Kubernetes Secret using a Helm chart, developers can easily build the Kyuubi with ETCD in K8S.

How was this patch tested?

• [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

• [ ] Add screenshots for manual tests if appropriate

• [ ] Run test locally before make a pull request

Was this patch authored or co-authored using generative AI tooling?

[zhaohehuhu]

plz help review it @pan3793

[codecov-commenter]

Codecov Report

Merging #5633 (6f9131f) into master (f23b6de) will increase coverage by 0.05%. Report is 4 commits behind head on master. The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #5633      +/-   ##
============================================
+ Coverage     61.36%   61.41%   +0.05%     
  Complexity       23       23              
============================================
  Files           603      603              
  Lines         35635    35635              
  Branches       4874     4874              
============================================
+ Hits          21867    21887      +20     
+ Misses        11387    11373      -14     
+ Partials       2381     2375       -6     

see 12 files with indirect coverage changes

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