planner: add some plan cache benchmark into bench daily

[hawkingrei]

What problem does this PR solve?

Issue Number: ref #65100

Problem Summary:

What changed and how does it work?

planner: add some plan cache benchmark into bench daily

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

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AilinKid, guo-shaoge

The full list of commands accepted by this bot can be found here.

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Details

Needs approval from an approver in each of these files:

• pkg/planner/OWNERS [AilinKid]

Approvers can indicate their approval by writing /approve in a comment
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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2026-01-12 03:37:17.133966812 +0000 UTC m=+242281.195831713: ☑️ agreed by guo-shaoge.
• 2026-01-12 03:40:21.047164277 +0000 UTC m=+242465.109029186: ☑️ agreed by AilinKid.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.6553%. Comparing base (69a1b2c) to head (d20eaec).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #65524        +/-   ##
================================================
- Coverage   77.8448%   77.6553%   -0.1895%     
================================================
  Files          1971       1895        -76     
  Lines        540836     528530     -12306     
================================================
- Hits         421013     410432     -10581     
+ Misses       118164     118092        -72     
+ Partials       1659          6      -1653     

Flag	Coverage Δ
integration	41.5314% <ø> (-6.6680%)	⬇️
unit	76.7608% <ø> (+0.3148%)	⬆️

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

Components	Coverage Δ
dumpling	56.7974% <ø> (ø)
parser	∅ <ø> (∅)
br	48.8077% <ø> (-12.3142%)	⬇️

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[hawkingrei]

/retest