planner: fix "order by + num " can use a column not in select fields

[time-and-fate]

What problem does this PR solve?

Issue Number: close #24667

What is changed and how it works?

What's Changed:

How it Works:

Related changes

• Need to cherry-pick to the release branch

Check List

Tests

• Unit test
• Integration test

Release note

• no release note.

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@time-and-fate: PR needs rebase.

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@time-and-fate: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
tiprow_fast_test	d8744a5	link	true	/test fast_test_tiprow

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@time-and-fate: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
idc-jenkins-ci-tidb/check_dev_2	d8744a5	link	true	/test check-dev2
pull-integration-ddl-test	d8744a5	link	true	/test pull-integration-ddl-test
idc-jenkins-ci-tidb/check_dev	d8744a5	link	true	/test check-dev
pull-mysql-client-test	d8744a5	link	true	/test pull-mysql-client-test
idc-jenkins-ci-tidb/unit-test	d8744a5	link	true	/test unit-test
idc-jenkins-ci-tidb/build	d8744a5	link	true	/test build
idc-jenkins-ci-tidb/mysql-test	d8744a5	link	true	/test mysql-test
pull-br-integration-test	d8744a5	link	true	/test pull-br-integration-test
pull-lightning-integration-test	d8744a5	link	true	/test pull-lightning-integration-test
pull-integration-e2e-test	d8744a5	link	true	/test pull-integration-e2e-test

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