feat(dnsovergetaddrinfo): collect the CNAME (#876)

* feat(dnsovergetaddrinfo): collect the CNAME

This diff modifies how dnsovergetaddrinfo.go works such that the
returned DNSResponse includes the CNAME.

Closes https://github.com/ooni/probe/issues/2226.

While there, recognize that we can remove getaddrinfoLookupHost and
always call getaddrinfoLookupANY everywhere. (This simplification is
why we did https://github.com/ooni/probe-cli/pull/874.)

* fix: extra debugging because of failing CI

Everything is OK locally (on macOS). However, maybe things are a bit
different on GNU/Linux perhaps?

Here's the error:

```
--- FAIL: TestPass (0.11s)
    resolver_test.go:113: unexpected rcode
FAIL
coverage: 95.7% of statements
FAIL	github.com/ooni/probe-cli/v3/internal/cmd/jafar/resolver	0.242s
```

I'm a bit confused because jafar's resolver is _unrelated_. But actually this
error never occurred again after a committed the debugging diff.

internal/cmd/jafar/resolver/resolver_test.go

@@ -110,7 +110,7 @@ func checkrequest(
 
 func checksuccess(t *testing.T, reply *dns.Msg) {
 	if reply.Rcode != dns.RcodeSuccess {
-		t.Fatal("unexpected rcode")
+		t.Fatal("unexpected rcode", reply.Rcode)
 	}
 	if len(reply.Answer) < 1 {
 		t.Fatal("too few answers")