[NSE856] optimize binary buffer allocation

[FelixYBW]

Allocate binary buffer from combine buffer as well
allocate single combine buffer for all partitions

[github-actions]

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Then could you also rename commit message and pull request title in the following format?

[NSE-${ISSUES_ID}] ${detailed message}

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[FelixYBW]

there is no performance difference if we set PreferSpill=true. because the memory is allocated once only