AccountTx and AccountReceipt EVM type

[petscheit]

Currently, when accessing a TX or Receipt in HDP, we need to provide (chain_id, block_number, item_index) to retrieve the Tx/Receipt via syscall. While this makes sense when retrieving the Txs from a block, it becomes cumbersome when trying to access a users TXs.

For this reason, we want to add the AccountTx and AccountReceipt EVM type, which allows the retrieval of Txs/Receipts using the following keys: (chain_id, address, nonce).