Fix instability of ubuntu-latest

[lucasmrod]

Sample failure: https://github.com/fleetdm/fleet/actions/runs/12683380540/job/35350357359

See actions/runner-images#10636.

We can fix other workflows if need be, let's start with the most used ones and that we've seen failures in.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.85%. Comparing base (ed56986) to head (9b5cc03).
Report is 17 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #25289      +/-   ##
==========================================
- Coverage   63.85%   63.85%   -0.01%     
==========================================
  Files        1616     1616              
  Lines      153852   153852              
  Branches     3977     3977              
==========================================
- Hits        98242    98238       -4     
- Misses      47796    47798       +2     
- Partials     7814     7816       +2     

Flag	Coverage Δ
backend	64.72% <ø> (-0.01%)	⬇️

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[lukeheath]

@lucasmrod FYI PR has a conflict.

[lucasmrod]

I'll close for now given that reverting back to ubuntu-22.04 did not solve the issue for golangci-lint CI action.