planner: remove internal pkg and move base code to certain place

[AilinKid]

What problem does this PR solve?

Issue Number: ref #51664

Problem Summary:

What changed and how does it work?

there is some redundant pkg with test kit code and base plan structure definition inside, this pr just classify them to certain pkg, and reduce unnecessary pkg import

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

[tiprow]

Hi @AilinKid. Thanks for your PR.

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[codecov]

Codecov Report

Merging #52620 (5ef7ab1) into master (3d82fc5) will increase coverage by 2.0312%.
Report is 6 commits behind head on master.
The diff coverage is 100.0000%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #52620        +/-   ##
================================================
+ Coverage   72.3590%   74.3902%   +2.0312%     
================================================
  Files          1470       1473         +3     
  Lines        427105     427412       +307     
================================================
+ Hits         309049     317953      +8904     
+ Misses        98798      89616      -9182     
- Partials      19258      19843       +585     

Flag	Coverage Δ
integration	48.9387% <100.0000%> (?)
unit	71.1750% <100.0000%> (-0.0756%)	⬇️

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

Components	Coverage Δ
dumpling	53.9957% <ø> (ø)
parser	∅ <ø> (∅)
br	49.7325% <ø> (+8.6492%)	⬆️

[AilinKid]

/retest-required

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[AilinKid]

/test check-dev2

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/ok-to-test

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[AilinKid]

/test fast_test_tiprow

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[AilinKid]

/test fast_test_tiprow

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@AilinKid: The specified target(s) for /test were not found.
The following commands are available to trigger required jobs:

• /test build
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The following commands are available to trigger optional jobs:

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Use /test all to run the following jobs that were automatically triggered:

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In response to this:

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-04-16 13:06:22.748882362 +0000 UTC m=+343401.859928811: ☑️ agreed by guo-shaoge.
• 2024-04-16 13:20:08.373704174 +0000 UTC m=+344227.484750617: ☑️ agreed by hawkingrei.