planner: move old cascades file into a limited pkg to avoid import core files.

[AilinKid]

What problem does this PR solve?

Issue Number: ref #51664

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

[tiprow]

Hi @AilinKid. Thanks for your PR.

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[ti-chi-bot]

PR needs rebase.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.4633%. Comparing base (91436e3) to head (1aa258f).
Report is 4 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #57246        +/-   ##
================================================
+ Coverage   72.9240%   73.4633%   +0.5393%     
================================================
  Files          1660       1665         +5     
  Lines        458646     460683      +2037     
================================================
+ Hits         334463     338433      +3970     
+ Misses       103645     101725      -1920     
+ Partials      20538      20525        -13     

Flag	Coverage Δ
integration	43.4504% <100.0000%> (?)
unit	72.2893% <100.0000%> (+0.0307%)	⬆️

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

Components	Coverage Δ
dumpling	52.7673% <ø> (ø)
parser	∅ <ø> (∅)
br	45.0326% <ø> (-0.0063%)	⬇️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, qw4990

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• pkg/planner/OWNERS [hawkingrei,qw4990]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-11-11 04:16:26.658319752 +0000 UTC m=+243348.849188746: ☑️ agreed by qw4990.
• 2024-11-11 05:26:06.526004911 +0000 UTC m=+247528.716873909: ☑️ agreed by hawkingrei.