Use ethereum event encoding/decoding

[swapnilraj]

The current encoding for events is close to Ethereum but not exactly the same, the work for updating that is ongoing. Once that is done, we will need to update the event decoding in hardhat-warp to match the same

[JorikSchellekens]

Has this been completed @swapnilraj ?

[rjnrohit]

It is awaiting reviews https://github.com/NethermindEth/warp/pull/882