Fail at rowSelection and_then method

[Ted-Jiang]

Describe the bug

let a = RowSelection::from(vec![
            RowSelector::select(3),
            RowSelector::skip(33),
            RowSelector::select(3),
            RowSelector::skip(33),
        ]);
        let b = RowSelection::from(vec![RowSelector::select(36), RowSelector::skip(36)]);

        assert_eq!(
            a.and_then(&b).selectors,
            vec![RowSelector::select(3), RowSelector::skip(69)]
        );

got

---- arrow::arrow_reader::selection::tests::test_and_2 stdout ----
thread 'arrow::arrow_reader::selection::tests::test_and_2' panicked at 'called `Option::unwrap()` on a `None` value', parquet/src/arrow/arrow_reader/selection.rs:233:38
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

To Reproduce

Expected behavior

Additional context

[tustvold]

This appears to be caused by the second row selector being longer than expected, a only selects 6 rows and so b should only be 6 long, instead of 72.

This is a bug that should be fixed, but shouldn't impact correctness

[viirya]

Hmm, if and_then takes the conjunction from two row selections, why b should be only 6 long? It looks like b must be in the selection range of a.

[alamb]

label_issue.py automatically added labels {'parquet'} from #2924