cdc: log slow conflict detect every 60s (#11251)

[ti-chi-bot]

This is an automated cherry-pick of #11251

What problem does this PR solve?

Issue Number: close #11271

What is changed and how it works?

Log slow conflict detect every 60s.

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

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hicqu

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[hicqu]

/retest

[codecov]

Codecov Report

Attention: Patch coverage is 32.14286% with 19 lines in your changes missing coverage. Please review.

Please upload report for BASE (release-8.1@2bd57a7). Learn more about missing BASE report.

Additional details and impacted files

Components	Coverage Δ
cdc	61.8186% <0.0000%> (?)
dm	51.3596% <0.0000%> (?)
engine	63.4373% <0.0000%> (?)

Flag	Coverage Δ
unit	57.5310% <32.1428%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

@@               Coverage Diff                @@
##             release-8.1     #11286   +/-   ##
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  Coverage               ?   57.5310%           
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  Files                  ?        853           
  Lines                  ?     125946           
  Branches               ?          0           
================================================
  Hits                   ?      72458           
  Misses                 ?      48076           
  Partials               ?       5412           

[hicqu]

/retest