Migrate the IPUDPBenchmark to use `BridgeDatagramProtocol` instead of shuffling packets with loopOutputHandlerPackets

[agnosticdev]

In #16 I updated QUICTransfer to use the more modern technique of using BridgeDatagramProtocol to transfer packets at the bottom instead of using the utility function loopOutputHandlerPackets. This issue is to also update the IPUDPBenchmark to use BridgeDatagramProtocol as well.