seqtest: migrate test-infra testify

[tisonkun]

Signed-off-by: tison wander4096@gmail.com

What problem does this PR solve?

Issue Number: close #28076

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• XuHuaiyu
• mmyj

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[tisonkun]

/run-check_dev_2

[tisonkun]

/cc @mmyj @XuHuaiyu

[mmyj]

I will review this in the weekend.

[tisonkun]

@mmyj thanks for your review! I'll take a look today.

[mmyj]

lgtm, and please resolve conflicting.

[XuHuaiyu]

LGTM

[tisonkun]

@XuHuaiyu @mmyj could you help on merging this PR?

[mmyj]

/merge

[ti-chi-bot]

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

Commit hash: be7f4c0

[ti-chi-bot]

@tisonkun: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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