[FEA] Deletion vector parquet reader should support return _deleted column.

When reading from table format, sometimes we need to return _deleted metadata column to mask if a row has been deleted by deletion vector rather than filtering directly. For example, let say a parquet file has 5 rows, and the deletion vector deleted rows 1, 3, then when read from parquet, we should still return 5 rows, but with a bool column (F, T, F, T, F)

Start at the parquet reader path used for table-format reads and trace where deletion vectors currently filter rows. Check existing reader tests for metadata-column behavior; done means a five-row input with rows 1 and 3 deleted returns five rows plus _deleted values (F, T, F, T, F).

Written by the indexing model from the issue text.