chore(cubestore): Upgrade DF: upgrade HLLMergeUDF implementation #8092

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10 warnings

unused import: `std::os::raw::c_void`

unused import: `std::ptr::NonNull`

unused import: `datafusion::arrow::error::ArrowError`

unused import: `MetadataCacheFactory`

unused import: `datafusion::arrow::compute::SortOptions`

unused imports: `LexOrdering` and `PhysicalSortExpr`

unused import: `datafusion::physical_plan::expressions::Column`

unused import: `TreeNodeRewriter`

unused imports: `Aggregate`, `Explain`, `Extension`, `Filter`, `Limit`, `Projection`, `Repartition`, `Sort`, and `Union`

unused import: `crate::queryplanner::optimizations::prefer_inplace_aggregates::try_regroup_columns`