Function dot_general_into 

pub fn dot_general_into<T>(
    c: StridedViewMut<'_, T>,
    a: &StridedView<'_, T>,
    b: &StridedView<'_, T>,
    config: &DotGeneralConfig<'_>,
    alpha: T,
    beta: T,
) -> Result<(), EinsumError>
where
    T: Scalar,
    FaerBackend: Backend<T>,

Compute C = alpha * dot_general(A, B) + beta * C with the active backend.