Create & publish go-http-client test image

[mariomac]

Checklist

• If this enhances / fixes / changes a core feature, I have updated the features documentation

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 44.60%. Comparing base (2aca041) to head (4c3ece6).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1349       +/-   ##
===========================================
+ Coverage   19.50%   44.60%   +25.10%     
===========================================
  Files         242      307       +65     
  Lines       28332    28320       -12     
===========================================
+ Hits         5527    12633     +7106     
+ Misses      22155    14931     -7224     
- Partials      650      756      +106     

Flag	Coverage Δ
integration-test	?
integration-test-arm	?
integration-test-vm-x86_64-5.15.152	?
integration-test-vm-x86_64-6.10.6	?
k8s-integration-test	?
oats-test	?
unittests	44.60% <ø> (?)

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