chore: use testify instead of testing.Fatal or testing.Error in util

[mmorel-35]

Description

• uses testify instead of testing.Fatal or testing.Error in util

[bunnyshell[bot]]

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 55.18%. Comparing base (b39f3b1) to head (53c2dc4). Report is 3 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #20751 +/- ## ========================================== + Coverage 55.12% 55.18% +0.06% ========================================== Files 324 324 Lines 55256 55256 ========================================== + Hits 30458 30493 +35 + Misses 22184 22157 -27 + Partials 2614 2606 -8 ```

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