*: revert #27021 to fix a bug that selection can not be pushed down when having clause above aggregation (#33168)

[ti-srebot]

cherry-pick #33168 to release-5.3
You can switch your code base to this Pull Request by using git-extras:

# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/33183

After apply modifications, you can push your change to this PR via:

git push git@github.com:ti-srebot/tidb.git pr/33183:release-5.3-47e4b5bf312a

---

Signed-off-by: wjhuang2016 huangwenjun1997@gmail.com

What problem does this PR solve?

Issue Number: close #33166

Problem Summary:
I don't know why #27021 get merged, but it's totally wrong.
First, selection can be pushed down when having clause above aggregation, it's true.
Second, the root cause of #26496 is the same as #30094, which is fixed by #30120

What is changed and how it works?

Revert #27021

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

fix a bug that selection can not be pushed down when having clause above aggregation

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has not been approved.

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

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

Reviewer can indicate their review by submitting an approval review.
Reviewer can cancel approval by submitting a request changes review.

[ti-srebot]

/run-all-tests

[ti-srebot]

@wjhuang2016 you're already a collaborator in bot's repo.