[improvement](external) Refine Parquet splits by row group in BE - #66802

[improvement](external) Refine Parquet splits by row group in BE#66802

Gabriel39 wants to merge 4 commits into

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Gabriel39:dev/file-split-rowgroup-context-4.1Gabriel39/incubator-doris:dev/file-split-rowgroup-context-4.1Copy head branch name to clipboard