Function linear_weights_of_rows 

pub fn linear_weights_of_rows<F: TowerField + HardwareField + Into<Block128>>(
    layout: &OuterLayout,
    rows: &OuterRows<'_, F>,
    tensor: &[F],
) -> Result<LinearBatch<F>>

Weights and target of the linear test on built rows: the reference linear_weights is tested against.