Use rayon to speed up batch KZG verification (#7921)

Addresses #7866.


  Use Rayon to speed up batch KZG verification during range / backfill sync.

While I was analysing the traces, I also discovered a bug that resulted in only the first 128 columns in a chain segment batch being verified. This PR fixes it, so we might actually observe slower range sync due to more cells being KZG verified.

I've also updated the handling of batch KZG failure to only find the first invalid KZG column when verification fails as this gets very expensive during range/backfill sync.

testing/ef_tests/src/cases/kzg_verify_cell_kzg_proof_batch.rs

@@ -53,7 +53,7 @@ impl<E: EthSpec> Case for KZGVerifyCellKZGProofBatch<E> {
                 let kzg = get_kzg();
                 match kzg.verify_cell_proof_batch(&cells, &proofs, cell_indices, &commitments) {
                     Ok(_) => Ok(true),
-                    Err(KzgError::KzgVerificationFailed) => Ok(false),
+                    Err((_, KzgError::KzgVerificationFailed)) => Ok(false),
                     Err(e) => Err(Error::InternalError(format!(
                         "Failed to validate cells: {:?}",
                         e