metric(ticdc): add SinkV2 flush rows dashboards

[Rustin170506]

What problem does this PR solve?

Issue Number: ref #5928

What is changed and how it works?

add SinkV2 flush rows dashboards.

I also reorder the dashboards and move the SinkV1 dashboard below.

Check List

Tests

• No code
• Please check out http://10.2.6.161:3000/d/YiGL8hBZ12121/test-cluster-ticdc2121?orgId=1&refresh=1m to the new dashboards.

Questions

Will it cause performance regression or break compatibility?

No

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

No

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• asddongmen
• zhaoxinyu

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[codecov-commenter]

Codecov Report

Merging #7325 (ebcb0be) into master (2843d67) will increase coverage by 0.1748%.
The diff coverage is 58.8905%.

Additional details and impacted files

Flag	Coverage Δ
cdc	67.6802% <63.8571%> (+0.4605%)	⬆️
dm	51.9477% <36.6666%> (+0.0426%)	⬆️
engine	60.8435% <54.0955%> (-0.2140%)	⬇️

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

@@               Coverage Diff                @@
##             master      #7325        +/-   ##
================================================
+ Coverage   59.6477%   59.8226%   +0.1748%     
================================================
  Files           790        798         +8     
  Lines         91016      91228       +212     
================================================
+ Hits          54289      54575       +286     
+ Misses        31982      31889        -93     
- Partials       4745       4764        +19     

[Rustin170506]

/merge

[ti-chi-bot]

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

Commit hash: ebcb0be

[ti-chi-bot]

@hi-rustin: Your PR was out of date, I have automatically updated it for you.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

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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