metrics: fix panel "retryable error"

[wjhuang2016]

What problem does this PR solve?

Issue Number: close #61051

Problem Summary:
After this PR:

What changed and how does it work?

Move the panel to DDL

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.0574%. Comparing base (f4d2318) to head (2b5eb1e).
Report is 25 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #61052        +/-   ##
================================================
+ Coverage   73.1387%   74.0574%   +0.9186%     
================================================
  Files          1724       1724                
  Lines        477000     483009      +6009     
================================================
+ Hits         348872     357704      +8832     
+ Misses       106705     104038      -2667     
+ Partials      21423      21267       -156     

Flag	Coverage Δ
integration	43.0403% <ø> (?)
unit	72.9126% <ø> (+0.5452%)	⬆️

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

Components	Coverage Δ
dumpling	52.7804% <ø> (ø)
parser	∅ <ø> (∅)
br	48.0647% <ø> (+0.5105%)	⬆️

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[lance6716]

The unique labels of "retryable error" may grow to a large number. It may cause some performance problems when display them.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: CbcWestwolf, zimulala

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Needs approval from an approver in each of these files:

• OWNERS [CbcWestwolf,zimulala]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-05-14 07:38:30.075782467 +0000 UTC m=+517176.223743680: ☑️ agreed by zimulala.
• 2025-05-14 09:43:50.381844794 +0000 UTC m=+524696.529806013: ☑️ agreed by CbcWestwolf.