Search and info conflict on snaps with whitelisted country

[Toto Bille]

All this is done with a UK IP (if it matters :) )

The snap raspberrymonitor has whitelisted a selection of territories.

If you search for the snap you can find it:
```
curl -H 'X-Ubuntu-Store: ubuntu' "https://api.snapcraft.io/api/v1/snaps/search?q=raspberrymonitor&fields=package_name" | jq
```

But if you get info of the snap, it returns a 404:
```
curl -s -H 'Snap-device-Series: 16' -H 'X-Ubuntu-Architecture: any' "https://api.snapcraft.io/v2/snaps/info/raspberrymonitor?fields=snap-id" | jq
```

(this impacts the storefront: see https://snapcraft.io/search?q=raspberrymonitor and https://snapcraft.io/raspberrymonitor )

[Daniel Manrique (roadmr)]

The snap is allowed only in Italy, this explains why you can't get info for it from a UK IP address, which I confirmed from a US address as well.

We don't consider the snap's allowed territories in find as it would make the already-slower-than-desired find much slower, since we would have to filter each snap in the result against the requesting IP's geolocation.