[fix](case) Fix different_serialize_cloud case

[deardeng]

What problem does this PR solve?

Fix

   createMV("create materialized view mv1_1 as select k1,bitmap_intersect(to_bitmap(k2)) from d_table group by k1;")
^^^^^^^^^^^^^^^^^^^^^^^^^^ERROR LINE^^^^^^^^^^^^^^^^^^^^^^^^^^

Exception:
java.sql.SQLException: errCode = 2, detailMessage = Duplicate column name 'k1'

Issue Number: close #xxx

Related PR: #xxx

Problem Summary:

Release note

None

Check List (For Author)

• Test

  • Regression test
  • Unit Test
  • Manual test (add detailed scripts or steps below)
  • No need to test or manual test. Explain why:
    • This is a refactor/code format and no logic has been changed.
    • Previous test can cover this change.
    • No code files have been changed.
    • Other reason

• Behavior changed:

  • No.
  • Yes.

• Does this need documentation?

  • No.
  • Yes.

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
• Add branch pick label

[yujun777]

LGTM

[deardeng]

run buildall

[github-actions]

PR approved by anyone and no changes requested.

[deardeng]

run buildall

[hello-stephen]

LGTM

[github-actions]

PR approved by at least one committer and no changes requested.