Bump github.com/stretchr/testify to 1.7.4

[paulcacheux]

What does this PR do?

Generalization and fix of #12464

Warning: The 1.7.3 is clearly not fixed (cf stretchr/testify#1208). We need to wait for 1.7.5

Motivation

Additional Notes

Possible Drawbacks / Trade-offs

Describe how to test/QA your changes

Reviewer's Checklist

• If known, an appropriate milestone has been selected; otherwise the Triage milestone is set.
• Use the major_change label if your change either has a major impact on the code base, is impacting multiple teams or is changing important well-established internals of the Agent. This label will be use during QA to make sure each team pay extra attention to the changed behavior. For any customer facing change use a releasenote.
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• If applicable, the config template has been updated.