Use new interface in robustness tests

[AwesomePatrol]

Robustness tests now use kubernetes.Interface (where possible) replacing use of kubernetesClient (deleted)

[k8s-ci-robot]

Hi @AwesomePatrol. Thanks for your PR.

I'm waiting for a etcd-io member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[serathius]

/ok-to-test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.73%. Comparing base (70a1726) to head (8335e70).
Report is 2 commits behind head on main.

Additional details and impacted files

see 29 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #19137      +/-   ##
==========================================
- Coverage   68.86%   68.73%   -0.13%     
==========================================
  Files         420      420              
  Lines       35640    35640              
==========================================
- Hits        24543    24498      -45     
- Misses       9679     9712      +33     
- Partials     1418     1430      +12     

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[serathius]

/retest

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AwesomePatrol, serathius

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• OWNERS [serathius]

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[AwesomePatrol]

/retest