Suricata

This is a HTTP1->HTTP2 upgrade

Timeline is
- packet 1 is processed (of the TCP flow) : nothing happens (waiting for ACK...)
- packet 2 is processed
- parsing packet 1
- generating app-layer-protocol change
- In FlowWorkerStreamTCPUpdate FlowChangeProto is true and StreamTcpDetectLogFlush is called, this creates pseudo packets to log the HTTP1 part of the packet, and then going on with HTTP2
- while dequeuing and processing Detect on these pseudo packets, we are setting flow action drop ie f->flags |= FLOW_ACTION_DROP;
- we then run Detect on the second packet, but we did not have the chance to call FlowHandlePacketUpdate which checks the flow flags to set the packet action

https://github.com/OISF/suricata/pull/10270