[GLUTEN-2038][VL][FOLLOWUP] Fix and add test #335
Merged
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The reason why
E2EFilterTest .metadataFilter
failed is that, it tests the filter pushdown using row group metadata but after #326 it only has one row group. This prs change the max rows in one row group to 10 which is aligned with the test batch size, so that each batch can produce a row group.Besides, this pr adds a new test to check we can combine small batches into a big row group.