chore: Fix remaining testifylint errors

[nickajacks1]

If this is too big, I can split this into multiple PRs.

Description

In preparation for the upcoming linter update, fix testifylint errors.
Where possible, require.ErrorContains was avoided. Using require.ErrorContains is planned to eventually be made a lint error.

https://github.com/Antonboom/testifylint

Type of Change

• Code consistency (non-breaking change which improves code reliability and robustness)

Checklist

Before you submit your pull request, please make sure you meet these requirements:

• Conducted a self-review of the code and provided comments for complex or critical parts.
• Added or updated unit tests to validate the effectiveness of the changes or new features.
• Ensured that new and existing unit tests pass locally with the changes.
• Verified that any new dependencies are essential and have been agreed upon by the maintainers/community.

[ReneWerner87]

LGTM