Function derive_isogeny_path2 

pub fn derive_isogeny_path2(
    c: &Curve2,
    gen: &Point2,
    ell: u64,
    a: u32,
) -> Option<Vec<IsogenyStep2>>

Unfold one order-ℓᵃ kernel generator into the chain of a prime-degree ℓ-isogenies over 𝔽_{p²} — the Curve2 analogue of crate::elliptic::derive_isogeny_path. ℓ an odd prime.