EIP-1559 for private transactions

[NickSneo]

Feature description

Adds support for EIP-1559 transactions via eth/eea_sendTransaction
encoding/decoding the EIP-1559 private transactions

As discussed here - https://discord.com/channels/779382027614158919/905428373218689054/1153588585044377602

[NickSneo]

PR merged, closing