planner: move some test into tests package

[hawkingrei]

What problem does this PR solve?

Issue Number: close #56352

close #56354

Problem Summary:

What changed and how does it work?

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

[hawkingrei]

/check-issue-triage-complete

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.5080%. Comparing base (119e765) to head (d7714bf).
Report is 16 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #56353        +/-   ##
================================================
+ Coverage   73.3251%   75.5080%   +2.1829%     
================================================
  Files          1619       1624         +5     
  Lines        446491     452186      +5695     
================================================
+ Hits         327390     341437     +14047     
+ Misses        99044      90170      -8874     
- Partials      20057      20579       +522     

Flag	Coverage Δ
integration	48.8903% <ø> (?)
unit	72.4782% <ø> (-0.0384%)	⬇️

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

Components	Coverage Δ
dumpling	52.9478% <ø> (ø)
parser	∅ <ø> (∅)
br	52.2679% <ø> (+7.2384%)	⬆️

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-09-27 03:08:27.511881687 +0000 UTC m=+1794577.252305626: ☑️ agreed by lance6716.
• 2024-09-27 05:09:12.950917388 +0000 UTC m=+1801822.691341326: ☑️ agreed by AilinKid.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AilinKid, lance6716, winoros

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