refactor(evm): review base and besu implementations of t8n evaluation via server

[danceratopz]

#792 added support for the ethereum-spec-evm-resolver which changed the way EELS executes t8n (previously via entry point and file IO, now via socker communcation and a server) - so a _evaluate_server() method was added to the TransitionTool base class. Besu's transition tool class BesuTransitionTool overrides the base class evaluate() with a similar method to TransitionTool::_evaluate_server() that handles the communication to its t8n-server. We should see if we can reconcile the differences between these two evaluate server methods.