tests: address bridge unexported return issue

[manthanguptaa]

Introducing a new Bridge interface to resolve bridge unexported return issue

Part of #18370.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: manthanguptaa
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[k8s-ci-robot]

Hi @manthanguptaa. 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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[manthanguptaa]

@ivanvc @jmhbnz requesting your review.

Also, I did push a signed commit but it still shows an unverified commit. I set up the GPG key for the same.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.76%. Comparing base (801dfc3) to head (0f6a30f).
Report is 65 commits behind head on main.

Additional details and impacted files

see 36 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #19105      +/-   ##
==========================================
- Coverage   68.77%   68.76%   -0.01%     
==========================================
  Files         420      420              
  Lines       35623    35640      +17     
==========================================
+ Hits        24498    24507       +9     
- Misses       9699     9705       +6     
- Partials     1426     1428       +2     

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