planner: merge tests into one

[hawkingrei]

What problem does this PR solve?

Issue Number: ref #44940

Problem Summary:

What is changed and how it works?

Check List

Tests

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

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

Merging #46919 (4ba9ab4) into master (f36f2a4) will decrease coverage by 0.6166%.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #46919        +/-   ##
================================================
- Coverage   73.2938%   72.6773%   -0.6166%     
================================================
  Files          1330       1351        +21     
  Lines        397463     403760      +6297     
================================================
+ Hits         291316     293442      +2126     
- Misses        87535      91662      +4127     
- Partials      18612      18656        +44     

Flag	Coverage Δ
integration	27.8171% <ø> (?)
unit	73.2941% <ø> (+0.0002%)	⬆️

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

Components	Coverage Δ
dumpling	54.0444% <ø> (ø)
parser	85.0019% <ø> (ø)
br	48.5793% <ø> (-4.3461%)	⬇️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hi-rustin, winoros

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• OWNERS [hi-rustin,winoros]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-09-12 12:18:39.62802566 +0000 UTC m=+1485.595613709: ☑️ agreed by winoros.
• 2023-09-12 12:46:53.829911948 +0000 UTC m=+3179.797499992: ☑️ agreed by hi-rustin.