[release/v1.6] v1.6 upgrade go 1.25.6

[rudrakhp]

ref: #7969

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.36%. Comparing base (27bf1cc) to head (e9ccfa2).
⚠️ Report is 1 commits behind head on release/v1.6.

Additional details and impacted files

@@               Coverage Diff                @@
##           release/v1.6    #7975      +/-   ##
================================================
+ Coverage         72.33%   72.36%   +0.02%     
================================================
  Files               231      231              
  Lines             34185    34185              
================================================
+ Hits              24729    24737       +8     
+ Misses             7674     7669       -5     
+ Partials           1782     1779       -3     

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