[release-3.6] Minor refacotr on the e2e test framework

[k8s-infra-cherrypick-robot]

This is an automated cherry-pick of #19388

/assign ahrtr

[k8s-ci-robot]

Hi @k8s-infra-cherrypick-robot. 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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[ahrtr]

/ok-to-test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.89%. Comparing base (bf1f998) to head (06092f8).
Report is 4 commits behind head on release-3.6.

Additional details and impacted files

see 19 files with indirect coverage changes

@@               Coverage Diff               @@
##           release-3.6   #19392      +/-   ##
===============================================
- Coverage        68.91%   68.89%   -0.02%     
===============================================
  Files              420      420              
  Lines            35764    35764              
===============================================
- Hits             24645    24641       -4     
- Misses            9693     9699       +6     
+ Partials          1426     1424       -2     

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[ahrtr]

cc. @ivanvc @jmhbnz @serathius @fuweid

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahrtr, k8s-infra-cherrypick-robot, serathius

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• OWNERS [ahrtr,serathius]

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