[feature] #1915: Implement Fast kura init mode

Signed-off-by: Shanin Roman <shanin1000@yandex.ru>

Author: Erigara

core/benches/kura.rs

@@ -14,7 +14,6 @@ use iroha_crypto::KeyPair;
 use iroha_data_model::{
     block::VersionedCommittedBlock, prelude::*, transaction::TransactionLimits,
 };
-use iroha_version::scale::EncodeVersioned;
 use tokio::{fs, runtime::Runtime};
 
 async fn measure_block_size_for_n_validators(n_validators: u32) {
@@ -62,10 +61,7 @@ async fn measure_block_size_for_n_validators(n_validators: u32) {
     let mut block_store = BlockStore::new(dir.path(), LockStatus::Unlocked);
     block_store.create_files_if_they_do_not_exist().unwrap();
 
-    let serialized_block: Vec<u8> = block.encode_versioned();
-    block_store
-        .append_block_to_chain(&serialized_block)
-        .unwrap();
+    block_store.append_block_to_chain(&block).unwrap();
 
     let metadata = fs::metadata(dir.path().join("blocks.data")).await.unwrap();
     let file_size = Byte::from_bytes(u128::from(metadata.len())).get_appropriate_unit(false);