Function evals_eq_hyperprism 

pub fn evals_eq_hyperprism<F: TwoAdicField, EF: ExtensionField<F>>(
    omega_pows: &[F],
    z: EF,
    x: &[EF],
) -> Vec<EF>

Given vector (z,x) in F^{n+1}, populates out with eq_{l_skip,n}(x, y) for y on hyperprism D_n.