update builder to use go1.25.5

[cpanato]

Summary

• update builder to use go1.25.5

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 26.16%. Comparing base (488eb97) to head (fbb914b).
⚠️ Report is 592 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2702       +/-   ##
===========================================
- Coverage   66.46%   26.16%   -40.30%     
===========================================
  Files          92      191       +99     
  Lines        9258    20128    +10870     
===========================================
- Hits         6153     5266      -887     
- Misses       2359    14033    +11674     
- Partials      746      829       +83     

Flag	Coverage Δ
e2etests	49.71% <ø> (+2.15%)	⬆️
unittests	16.68% <ø> (-31.01%)	⬇️

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