Refactor VersionedUnspentOutput / Inputs

[Neylix]

Is your feature request related to a problem?

Currently the structs VersionedUnspentOutput contains the unspent output and the protocol version:

%VersionedUnspentOutput{
  protocol_version: v,
  unspent_output: %UnspentOutput{]}
}

But this is makes the code more complex to write and understand

Describe the solution you'd like

It could be more easy to keep the UnspentOutput struct and add the protocol version in it directly.

Additional context

No response

Epic

No response