syncer(dm): Improve logging of ignored TableMap/FormatDesc (#10205)

[ti-chi-bot]

This is an automated cherry-pick of #10205

What problem does this PR solve?

Issue Number: close #10204

What is changed and how it works?

This makes the logging on the warning level less noisy and adds detail to the TableMap event logs.

Check List

Tests

• Manual test (add detailed scripts or steps below)

Questions

Will it cause performance regression or break compatibility?

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

Release note

Logging of `TableMapEvent` and `FormatDescriptionEvent` was changed from the warning level to the info level.

[ti-chi-bot]

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[ti-chi-bot]

@ti-chi-bot: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
jenkins-ticdc/verify	9e95bb3	link	true	/test verify
pull-dm-integration-test	9e95bb3	link	true	/test dm-integration-test
pull-dm-compatibility-test	9e95bb3	link	true	/test dm-compatibility-test

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