message: [dlog/commitment] fix field_new
diff: -use ark_ff::{field_new, BigInteger256, SquareRootField};
  -use mina_curves::pasta;
  +use ark_ff::{field_new, SquareRootField};
  +use mina_curves::pasta::{Fp, Fq};
  pub trait QnrField: SquareRootField {
  const QNR: Self;
  }
  -impl QnrField for pasta::Fp {
  +impl QnrField for Fp {
  // 5
  - const QNR: Self = field_new!(
  - Self,
  - BigInteger256([
  - 0xa1a55e68ffffffed,
  - 0x74c2a54b4f4982f3,
  - 0xfffffffffffffffd,
  - 0x3fffffffffffffff
  - ])
  - );
  + const QNR: Self = field_new!(Fp, "5");
  }
  -impl QnrField for pasta::Fq {
  +impl QnrField for Fq {
  // 5
  - const QNR: Self = field_new!(
  - Self,
  - BigInteger256([
  - 0x96bc8c8cffffffed,
  - 0x74c2a54b49f7778e,
  - 0xfffffffffffffffd,
  - 0x3fffffffffffffff
  - ])
  - );
  + const QNR: Self = field_new!(Fq, "5");
  }
  