Suricata

If you play this pcap that utilizes GRE encapsulated traffic (attached), you can see we get the following log:

``` {
"timestamp": "2023-10-03T13:44:01.870735+0000",
"flow_id": 362080176641266,
"event_type": "flow",
"src_ip": "10.0.0.1",
"dest_ip": "10.0.0.2",
"ip_v": 4,
"proto": "ICMP",
"icmp_type": 8,
"icmp_code": 0,
"response_icmp_type": 0,
"response_icmp_code": 0,
"flow": {
"pkts_toserver": 5,
"pkts_toclient": 5,
"bytes_toserver": 420,
"bytes_toclient": 420,
"start": "2023-10-03T13:44:01.870735+0000",
"end": "2023-10-03T13:44:05.878563+0000",
"age": 4,
"state": "established",
"reason": "shutdown",
"alerted": false
}
}

```
We can see that the inner packet details are shown, but there is no details about the outer layer.

It seems that this was supposed to be fixed per this redmine long ago - https://redmine.openinfosecfoundation.org/issues/2011, but the test we just did on a suricata 8.0.3 fresh build shows that it is still not showing the outer layer.