planner, expression: avoid exprs with side effects in column pruning and agg pushdown (#27370)

[ti-srebot]

cherry-pick #27370 to release-4.0
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# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/27636

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git push git@github.com:ti-srebot/tidb.git pr/27636:release-4.0-8dcebd12395d

---

What problem does this PR solve?

Issue Number: close #27106

Problem Summary:

What is changed and how it works?

1. Do not prune expressions with side effects in column pruning. (planner/core/rule_column_pruning.go)
2. Do not push down agg across projection if there are expressions with side effects in projection. (planner/core/rule_aggregation_push_down.go)

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

None

[ti-chi-bot]

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[ti-chi-bot]

@ti-srebot: This cherry pick PR is for a release branch and has not yet been approved by release team.
Adding the do-not-merge/cherry-pick-not-approved label.

To merge this cherry pick, it must first be approved by the collaborators.

AFTER it has been approved by collaborators, please ping the release team in a comment to request a cherry pick review.

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[ti-srebot]

/run-all-tests

[ti-srebot]

@time-and-fate you're already a collaborator in bot's repo.

[time-and-fate]

After discussion with the release manager, we don't need to cherry-pick it to release-4.0.
Please close this PR.

[ti-chi-bot]

@ti-srebot: PR needs rebase.

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/test-infra repository.