planner: prevent pushing Projection with virtual columns down to UnionScan (#53981)

[ti-chi-bot]

This is an automated cherry-pick of #53981

What problem does this PR solve?

Issue Number: close #53951

Problem Summary: planner: prevent pushing Projection with virtual columns down to UnionScan

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

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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• OWNERS [AilinKid,hi-rustin]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-07-10 08:31:55.176324431 +0000 UTC m=+432812.411558540: ☑️ agreed by hi-rustin.
• 2024-07-10 08:33:10.633445115 +0000 UTC m=+432887.868679229: ☑️ agreed by AilinKid.

[qw4990]

/retest

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-7.5@4f5d583). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-7.5     #54351   +/-   ##
================================================
  Coverage               ?   72.2450%           
================================================
  Files                  ?       1412           
  Lines                  ?     412626           
  Branches               ?          0           
================================================
  Hits                   ?     298102           
  Misses                 ?      94603           
  Partials               ?      19921           

Flag	Coverage Δ
unit	72.2450% <100.0000%> (?)

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

Components	Coverage Δ
dumpling	53.9913% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	53.6894% <0.0000%> (?)

[qw4990]

/test unit-test

[tiprow]

@qw4990: No presubmit jobs available for pingcap/tidb@release-7.5

In response to this:

/test unit-test

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[qw4990]

/test unit-test

[tiprow]

@qw4990: No presubmit jobs available for pingcap/tidb@release-7.5

In response to this:

/test unit-test

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.