draft: row group base parallel scan for iceberg-datafusion #1610
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- Introduce FileScanGroup for FileScanTask to make it can be split and merge - Modify reader to read the FileScanTask with group
Init GroupPruner
using group base parallel scan for iceberg-datafusion
fix check
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Which issue does this PR close?
draft Implementation of #1604
What changes are included in this PR?
Are these changes tested?