fix: use require instead of t.Fatal(err) in tests/common package

[mmorel-35]

This uses testify instead of testing for t.Fatal calls

[k8s-ci-robot]

Hi @mmorel-35. Thanks for your PR.

I'm waiting for a etcd-io member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[mmorel-35]

/assign @ahrtr

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

Project coverage is 68.69%. Comparing base (3de0018) to head (7e3dcfa). Report is 4 commits behind head on main.

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[ivanvc]

/ok-to-test

[mmorel-35]

/test pull-etcd-integration-1-cpu-amd64

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahrtr, ivanvc, mmorel-35

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