test: fix multi_topics test

[wk989898]

What problem does this PR solve?

Issue Number: ref #442

What is changed and how it works?

1. send checkpointTs to previous table after renaming table.
2. fix topic generator about hard code rule.
3. auto create topic when topic does not exist.

Check List

Tests

• Unit test
• Integration test

Questions

Will it cause performance regression or break compatibility?

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

Release note

`None`.

[ti-chi-bot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: 3AceShowHand

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-03-04 06:04:49.077574753 +0000 UTC m=+335202.206494495: ☑️ agreed by 3AceShowHand.