kv (ticdc): reduce some verbose log (#11077)

[ti-chi-bot]

This is an automated cherry-pick of #11077

What problem does this PR solve?

Issue Number: close #11074

What is changed and how it works?

Check List

Tests

• 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

None