Function mz_sql::plan::query::resolve_desc_and_nulls_last

pub(crate) fn resolve_desc_and_nulls_last<T: AstInfo>(
    obe: &OrderByExpr<T>,
    column: usize
) -> ColumnOrder

Creates a ColumnOrder from an OrderByExpr and column index. Column index is specified by the caller, but desc and nulls_last is figured out here.