Enable larger gRPC messages

[tzdybal]

Currently gRPC server is created using default options. Because of that, there is no way to increase maximum message size.

https://github.com/rollkit/go-execution-evm/blob/dbfa391735326f8d33a1a4f792c30680eb83e627/cmd/evm-middleware/commands/run.go#L73

There should be configuration option to set max message size.

Corresponding change in server creation should look like:

		s := grpc.NewServer(
			grpc.MaxRecvMsgSize(maxMsgSize),
			grpc.MaxSendMsgSize(maxMsgSize),
		)