Add Antithesis package imports

[abdurrehman107]

This PR complements this PR which added a Go client for robustness tests. With this PR we have introduced the Antithesis library.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.82%. Comparing base (aa2a025) to head (5ac6079).
Report is 2 commits behind head on main.

Additional details and impacted files

see 18 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #19767      +/-   ##
==========================================
+ Coverage   68.78%   68.82%   +0.03%     
==========================================
  Files         421      421              
  Lines       35857    35857              
==========================================
+ Hits        24665    24679      +14     
+ Misses       9759     9752       -7     
+ Partials     1433     1426       -7     

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: abdurrehman107, serathius

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