planner: append common handle columns into the schema of index merge table plan (#23933)

[ti-srebot]

cherry-pick #23933 to release-5.0
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/24042

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

git push [email protected]:ti-srebot/tidb.git pr/24042:release-5.0-50ea46ccb068

---

What problem does this PR solve?

Issue Number: close #23906

Problem Summary:

Planner fails to build a plan.

What is changed and how it works?

What's Changed:

• append common handle columns into the schema of index merge table plan

Related changes

N/A

Check List

Tests

• Unit test

Side effects

N/A

Release note

• Append common handle columns into the schema of index merge table plan

[ti-srebot]

/run-all-tests

[ti-srebot]

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

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• qw4990
• winoros

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[eurekaka]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 90f5ec0

[eurekaka]

/merge

[eurekaka]

/merge

[eurekaka]

/merge

[ti-chi-bot]

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