eth_getLogs - refinements

[rodolfopietro97]

According to the vechain node swagger, the logIndex and the transactionIndex are not returned. If, as reported, the only alternative is to query a block for every entry log, we can implement it in the eth_subscribe call, in which logs are referring just to one block (which is get before invoking eth_getLogs).

[victhorbi]

@rodolfopietro97 as you were suggesting, let's make sure to collect all the requirements for the protocol team.

[victhorbi]

duplicated, can be closed like #1074