engine(dm): fix unstable engine test dm_lightning_checkpoint

[GMHDBJD]

What problem does this PR solve?

Issue Number: ref #4159

What is changed and how it works?

• do not check database because task may immediately finished

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

Release note

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[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• D3Hunter
• lance6716

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[GMHDBJD]

/run-engine-integration-test

[GMHDBJD]

/merge

[ti-chi-bot]

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

Commit hash: 2d506ed

[ti-chi-bot]

@GMHDBJD: Your PR was out of date, I have automatically updated it for you.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

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