`playground/cm31_ntt/benches/ntt_r8_hybrid_ps`: refactor

[recmo]

On 2025-08-29 in 2a57572 “Merge pull request #153 from worldfnd/px/refactor”:

refactor

        let mut f = vec![CF::zero(); n];
        for i in 0..n {
            f[i] = rng.r#gen();
        }
        // TODO: refactor
        let precomp_small = if n < NTT_BLOCK_SIZE_FOR_CACHE {
            precomp_for_ntt_r8_ip_p(n, wn).unwrap()
        } else {
            precomp_for_ntt_r8_ip_p(
                NTT_BLOCK_SIZE_FOR_CACHE,

From playground/cm31_ntt/benches/ntt_r8_hybrid_ps.rs:22

[xrvdg]

CM31 NTT will be replaced with another implementation.