Add sequencer data to stream server

[ToniRamirezM]

Closes #2515

What does this PR do?

Adds sequencer data to stream server.

New config params:

[Sequencer.StreamServer]
      Port = 6900
      Filename = "/datastreamer/datastream.bin"
      Enabled = true

Reviewers

Main reviewers:

• @dpunish3r
• @Psykepro
• @agnusmor

[agnusmor]

This rollback should not be done in line 182? as in the line 182 we are returning with an open db transaction (started in line 175)

[agnusmor]

I think this code does the same:

if d.streamServer != nil {
		l2Block := DSL2Block{
			BatchNumber:    tx.batchNumber,
			L2BlockNumber:  l2BlochHeader.Number.Uint64(),
			Timestamp:      tx.timestamp,
			GlobalExitRoot: batch.GlobalExitRoot,
			Coinbase:       tx.coinbase,
		}

		l2Transaction := DSL2Transaction{
			BatchNumber:                 batch.BatchNumber,
			EffectiveGasPricePercentage: uint8(tx.response.EffectivePercentage),
			IsValid:                     1,
			EncodedLength:               uint32(len(txData)),
			Encoded:                     txData,
		}

		err = d.streamServer.StartAtomicOp()
		if err != nil {
			return err
		}

		_, err = d.streamServer.AddStreamEntry(EntryTypeL2Block, l2Block.Encode())
		if err != nil {
			return err
		}

		_, err = d.streamServer.AddStreamEntry(EntryTypeL2Tx, l2Transaction.Encode())
		if err != nil {
			return err
		}

		err = d.streamServer.CommitAtomicOp()
		if err != nil {
			log.Error("failed to commit atomic op: %v", err)
			err2 := dbTx.Rollback(ctx)
			if err2 != nil {
				log.Errorf("failed to rollback dbTx when committing atomic op that gave err: %v. Rollback err: %v", err2, err)
			}
			return err
		}
	} 

	err = dbTx.Commit(ctx)
	if err != nil {
		return err
	}

[ToniRamirezM]

If we do the error check this way, we would return without rolling back the stream transaction.

[agnusmor]

StreamServer or DataStreamer? As we have used DataStreamerCfg for the config struct