[WIP] Execute the same validation for TXN to avoid data inconsistency

[ArkaSaha30]

This MR addresses the issue: #18667
Steps Ref: #18667 (comment)

• create an e2e or integration test to reproduce the issue.
• apply the patch (ahrtr@76ac23f) to ensure it fixes the issue.
• evaluate the performance impact.

Please read https://github.com/etcd-io/etcd/blob/main/CONTRIBUTING.md#contribution-flow.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.78%. Comparing base (7b429f9) to head (704e5cc).
Report is 1045 commits behind head on main.

❗ Current head 704e5cc differs from pull request most recent head d25513d

Please upload reports for the commit d25513d to get more accurate results.

Additional details and impacted files

Files with missing lines	Coverage Δ
server/etcdserver/server.go	81.02% <ø> (-0.11%)	⬇️

... and 18 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #18680      +/-   ##
==========================================
- Coverage   68.80%   68.78%   -0.03%     
==========================================
  Files         420      420              
  Lines       35540    35527      -13     
==========================================
- Hits        24455    24436      -19     
+ Misses       9666     9663       -3     
- Partials     1419     1428       +9     

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[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed after 21 days if no further activity occurs. Thank you for your contributions.

[k8s-ci-robot]

PR needs rebase.

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