util/sem: migrate test-infra to testify

[PragmaTwice]

What problem does this PR solve?

Issue Number: close #26416

Problem Summary: ref to #26022

Release note

• No release note

[CLAassistant]

All committers have signed the CLA.

[tisonkun]

LGTM

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[REVIEW NOTIFICATION]

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• morgo
• xhebox

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[xhebox]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 0df0694

[ti-chi-bot]

@PragmaTwice: Your PR was out of date, I have automatically updated it for you.

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