[fix](local shuffle) Fix unbalanced data distribution

[Gabriel39]

What problem does this PR solve?

Now LOCAL_EXCHANGE_OPERATOR (BUCKET_HASH_SHUFFLE) use a wrong buckets num to distribute rows so it got an unbalance distribution. This PR fix it.

Before:

LOCAL_EXCHANGE_OPERATOR (BUCKET_HASH_SHUFFLE) (id=-10):
                    - RowsProduced: sum 32.636547M (32636547), avg 2.719712M (2719712), max 10.932368M (10932368), min 0

After:

LOCAL_EXCHANGE_OPERATOR (BUCKET_HASH_SHUFFLE) (id=-10):
                    - RowsProduced: sum 32.636547M (32636547), avg 2.719712M (2719712), max 2.736918M (2736918), min 2.6938M (2693800)

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

[doris-robot]

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Please clearly describe your PR:

1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
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4. Which code was refactored and why was this part of the code refactored?
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[Gabriel39]

run buildall

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[github-actions]

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

[github-actions]

PR approved by anyone and no changes requested.

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 37.98% (9899/26064)
Line Coverage: 29.18% (82770/283644)
Region Coverage: 28.32% (42500/150086)
Branch Coverage: 24.89% (21554/86590)
Coverage Report: http://coverage.selectdb-in.cc/coverage/39e9d49f3cef340d05e24f461327e0b17a3246c2_39e9d49f3cef340d05e24f461327e0b17a3246c2/report/index.html

[Gabriel39]

run buildall

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 38.01% (9899/26040)
Line Coverage: 29.19% (82762/283572)
Region Coverage: 28.33% (42505/150061)
Branch Coverage: 24.89% (21556/86592)
Coverage Report: http://coverage.selectdb-in.cc/coverage/39e9d49f3cef340d05e24f461327e0b17a3246c2_39e9d49f3cef340d05e24f461327e0b17a3246c2/report/index.html

[Gabriel39]

run buildall

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[doris-robot]

TeamCity be ut coverage result:
Function Coverage: 38.00% (9897/26042)
Line Coverage: 29.18% (82747/283538)
Region Coverage: 28.31% (42486/150069)
Branch Coverage: 24.88% (21545/86594)
Coverage Report: http://coverage.selectdb-in.cc/coverage/44eddc4983811d52b6821d335011aa3e95f8d8b9_44eddc4983811d52b6821d335011aa3e95f8d8b9/report/index.html