planner: fix inner subq build process will ref-use outer's expand meta (#56424)

[ti-chi-bot]

This is an automated cherry-pick of #56424

What problem does this PR solve?

Issue Number: close #56218

Problem Summary:

What changed and how does it work?

the details is commented here: #56218 (comment)
mainly about two points

• in plan building process, outer's scope's expand should be pushed into stack, while at the same time it should be cleaned from current plan builder as well.

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.

planner: fix inner subq build process will ref-use outer's expand meta
优化器：修复了内层子查询构建时候会引用外层 scope 中的 expand 元信息

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [AilinKid,hawkingrei]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-10-12 08:15:50.550447434 +0000 UTC m=+86147.699357266: ☑️ agreed by AilinKid.
• 2024-10-12 08:16:44.788943622 +0000 UTC m=+86201.937853447: ☑️ agreed by hawkingrei.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-8.1@f3ec312). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-8.1     #56611   +/-   ##
================================================
  Coverage               ?   71.1947%           
================================================
  Files                  ?       1466           
  Lines                  ?     423169           
  Branches               ?          0           
================================================
  Hits                   ?     301274           
  Misses                 ?     101379           
  Partials               ?      20516           

Flag	Coverage Δ
unit	71.1947% <100.0000%> (?)

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

Components	Coverage Δ
dumpling	52.9656% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	41.3149% <0.0000%> (?)

[hawkingrei]

/retest