[Robustness test] Merge Antithesis Github workflows

[henrybear327]

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.55%. Comparing base (8f933a5) to head (0392f54).
Report is 2 commits behind head on main.

Additional details and impacted files

see 48 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #19790      +/-   ##
==========================================
- Coverage   68.81%   67.55%   -1.26%     
==========================================
  Files         421      421              
  Lines       35863    35863              
==========================================
- Hits        24678    24227     -451     
- Misses       9754    10210     +456     
+ Partials     1431     1426       -5     

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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