Extend ConsensusEvent to support transaction in Bytes format

[IvanKavaldzhiev]

Problem

A lot of the platform testing apps use ConsensusEvent interface to handle transactions. In order to adapt the testing apps to support the new transaction format of only bytes, we should adapt the ConsensusEvent interface to be able to return such transactions.

Solution

Adapt ConsensusEvent interface to return List representing transactions in the new format and add implementation for each class that extend it.

Alternatives

No response