When a resolver_ip has the Well-Known Prefix 64:ff9b::/96 , OONI Probe should convert it to the original IPv4 address

[Lanius-collaris]

Describe the bug

https://explorer.ooni.org/m/20240507221036.381708_VN_webconnectivity_b2064b22095d3285

To Reproduce

dig @2001:4860:4860::64 +tls whoami.v4.powerdns.org aaaa

Expected behavior

resolver_asn is not AS0

System information (if applicable):

Additional context