feat(netxlite): implements NS queries (#734)

This diff has been extracted from https://github.com/bassosimone/websteps-illustrated/commit/eb0bf38957e79fbad198fcdc9f9c7b36f61a8e2c.

See https://github.com/ooni/probe/issues/2096.

While there, skip the broken tests caused by issue
https://github.com/ooni/probe/issues/2098.

internal/cmd/jafar/uncensored/uncensored.go

@@ -67,6 +67,11 @@ func (c *Client) LookupHTTPS(ctx context.Context, domain string) (*model.HTTPSSv
 	return nil, errors.New("not implemented")
 }
 
+// LookupNS implements model.Resolver.LookupNS.
+func (c *Client) LookupNS(ctx context.Context, domain string) ([]*net.NS, error) {
+	return nil, errors.New("not implemented")
+}
+
 // Network implements Resolver.Network
 func (c *Client) Network() string {
 	return c.dnsClient.Network()