Function intkambe_array 

pub fn intkambe_array(
    orders: Vec<i32>,
    arguments: [Vec<Complex>; 2],
) -> Result<(Vec<Complex>, IntkambeResidual)>

intkambe over arrays, each input one value or one value per element, with the residual of their z and eta gradients; the integer order has none.

Upstream: treams.special.intkambe over arrays.