Research if we can accept EIP-1898 block spec in `eth_getTransactionByBlockNumberAndIndex`

[agostbiro]

We currently don't accept EIP-1898 block specs in eth_getTransactionByBlockNumberAndIndex in order to match Hardhat behavior. We need to determine if adding support for EIP-1898 block specs in eth_getTransactionByBlockNumberAndIndex would be conformant with Geth.

Definition of done

Determine if Geth supports EIP-1898 block specs in eth_getTransactionByBlockNumberAndIndex and create follow up task to implement if yes.