Function config

pub fn config<let T: u32, let N: u32, let X: u32>(
    t: Field,
    rf: u8,
    rp: u8,
    alpha: Field,
    round_constants: [Field; N],
    mds: [[Field; T]; T],
    presparse_mds: [[Field; T]; T],
    sparse_mds: [Field; X],
) -> PoseidonConfig<T, N, X>