Fix node restart on gnosis-cancun (#6423)

* first draft

* add more things

* fix metric

* fix

* add tests

* add serializers and tests

* simplification

* adjust network and rpc tests

* post-merge fixes

* enable eth68

* adjust tests

* fix

* Use blob gas instead of count

* Shuffle 4844 constants, add GetMaxBlobsPerBlock

* Replace `Keccak` with `Hash256`

* fix PeerInfoExtensions

* fix StateSyncDownloader

* fix GetNodeDataTrieNodeRecovery

* improve switching capabilities

* `WasProcessed = true` for Genesis `BlockInfo`

* Add tests

---------

Co-authored-by: Marcin Sobczak <marcindsobczak@gmail.com>
Co-authored-by: Ruben Buniatyan <rubo@users.noreply.github.com>
Co-authored-by: Alexey Osipov <me@flcl.me>

src/Nethermind/Nethermind.Blockchain.Test/BlockTreeTests.cs

@@ -1827,8 +1827,9 @@ public void Find_handles_invalid_blocks(Func<BlockTree, Hash256?, BlockTreeLooku
             findFunction(blockTree, invalidBlock.Hash, lookupOptions).Should().Be(foundInvalid ? invalidBlock.Header : null);
         }
 
-        [Test]
-        public void On_restart_loads_already_processed_genesis_block()
+        [TestCase(true)]
+        [TestCase(false)]
+        public void On_restart_loads_already_processed_genesis_block(bool wereProcessed)
         {
             TestMemDb blocksDb = new();
             TestMemDb headersDb = new();
@@ -1897,7 +1898,7 @@ public void On_restart_loads_already_processed_genesis_block()
                 tree.SuggestBlock(genesis);
                 tree.Genesis.Should().NotBeNull();
 
-                tree.UpdateMainChain(ImmutableList.Create(genesis), true);
+                tree.UpdateMainChain(ImmutableList.Create(genesis), wereProcessed);
 
                 tree.SuggestBlock(second);
                 tree.SuggestBlock(third);

src/Nethermind/Nethermind.Blockchain/BlockTree.cs

@@ -1434,6 +1434,7 @@ void SetTotalDifficultyDeep(BlockHeader current)
                 {
                     current.TotalDifficulty = current.Difficulty;
                     BlockInfo blockInfo = new(current.Hash, current.Difficulty);
+                    blockInfo.WasProcessed = true;
                     UpdateOrCreateLevel(current.Number, current.Hash, blockInfo);
                 }