Send mining notifications before global timeout

[Neylix]

Describe the problem you discovered

Actually there is a global timeout for a transaction to be mined (1 minute). If the timeout is reached the mining process notify the error and stop :

  def handle_event(
        {:timeout, :stop_timeout},
        :any,
        _state,
        data = %{context: %ValidationContext{transaction: tx}}
      ) do
    Logger.warning("Timeout reached during mining",
      transaction_type: tx.type,
      transaction_address: Base.encode16(tx.address)
    )

    notify_error(:timeout, data)
    :stop
  end

This can lead to a problem when some storage node do not respond with a storage confirmation. In order to notify the previous chain and the beacon chain, a validation node wait for all the storage confirmations, but if one of the storage node do not respond, the validation node will reach the global timeout and so don't notify beacon chain and previous chain. If this happen on all the validation nodes, the transaction will never be added into the beacon chain even if it has been replicated by 95 % of the storage nodes.

Describe the solution you'd like

To avoid this problem, when a node reach the global timeout, if the current state is replication then it should notify the previous chain and the beacon chain (if there is at least 1 storage confirmations)

Additional context

Epic: #306