Fix QUICTransfer

[agnosticdev]

In the current pattern the QUICTransfer benchmark did not work due to ProtocolStreamHandlers having an empty upperReceiveQueue. Now the reads are scheduled on a new async block to give the original write time to unwind and process through the stack.

I double checked IPUDPTransfer, QUICHandshake, and QUICStreamLoad also and they seem to be fine.

[tfpauly]

I think the more correct solution here is to model off of what QUICStreamLoad does and use BridgeDatagramProtocol.

[agnosticdev]

I think the more correct solution here is to model off of what QUICStreamLoad does and use BridgeDatagramProtocol.

Yeah, we can deprecate the old pattern and migrate to BridgeDatagramProtocol. IPUDPTransfer still needs to adopt BridgeDatagramProtocol as well so I will open an issue there.