planner: remove the limitation that predicates can't be pushed through Projection on TableDual (#51329)

[ti-chi-bot]

This is an automated cherry-pick of #51329

What problem does this PR solve?

Issue Number: close #50614

Problem Summary:

#35669 disables predicates pushdown on TableDual.
This usually won't cause problems, but when it comes to cases like #50614, many unnecessary predicates with lots of conditions will cause obvious performance regression.

What changed and how does it work?

This PR reverts #35669, which is for fixing #35527.
#35527 itself has already been fixed by #38802, which prevents predicates from being incorrectly pushed through Projection.

As said in #35669, sometimes TableDual doesn't have a schema. This may or may not be considered as a mistake depending on our definition of the semantic of TableDual.
Anyway, TableDual without schema should not cause a problem if the predicates are pushed down correctly.

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

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (release-7.5@31c60e0). Click here to learn what that means.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-7.5     #52165   +/-   ##
================================================
  Coverage               ?   71.9868%           
================================================
  Files                  ?       1408           
  Lines                  ?     409169           
  Branches               ?          0           
================================================
  Hits                   ?     294548           
  Misses                 ?      94807           
  Partials               ?      19814           

Flag	Coverage Δ
unit	71.9868% <ø> (?)

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	53.3591% <0.0000%> (?)

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tangenta, winoros

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 [tangenta,winoros]

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:

• 2024-03-27 14:00:16.669353535 +0000 UTC m=+2076443.691599944: ☑️ agreed by winoros.
• 2024-03-28 08:23:01.050520501 +0000 UTC m=+2142608.072766888: ☑️ agreed by tangenta.