radicle/node/bootstrap: Remove IP addresses — heartwood

Due to connection retries in radicle-node not choosing new addresses, mistakenly using an IPv6 address when IPv6 is not supported would result in failure to bootstrap.

Work around by removing IP addresses again. This means that DNS or Tor will be required to bootrstrap.

 /// Configured public seeds.
 pub mod seeds {
     use std::{
         net::{Ipv4Addr, Ipv6Addr},
         str::FromStr,
         sync::LazyLock,
     };
     use std::{str::FromStr, sync::LazyLock};
     use cyphernet::addr::{tor::OnionAddrV3, HostName, NetAddr};

             NodeId::from_str("z6MkrLMMsiPWUcNPHcRajuMi9mDfYckSoJyPwwnknocNYPm7").unwrap(),
             vec![
                 HostName::Dns("iris.radicle.xyz".to_owned()),
                 Ipv6Addr::new(0x2a01, 0x4f9, 0xc010, 0xdfaa, 0, 0, 0, 1).into(),
                 Ipv4Addr::new(95, 217, 156, 6).into(),
                 #[allow(clippy::unwrap_used)] // Value is manually verified.
                 OnionAddrV3::from_str(
                     "irisradizskwweumpydlj4oammoshkxxjur3ztcmo7cou5emc6s5lfid.onion",

             NodeId::from_str("z6Mkmqogy2qEM2ummccUthFEaaHvyYmYBYh3dbe9W4ebScxo").unwrap(),
             vec![
                 HostName::Dns("rosa.radicle.xyz".to_owned()),
                 Ipv6Addr::new(0x2a01, 0x4ff, 0xf0, 0xabd3, 0, 0, 0, 1).into(),
                 Ipv4Addr::new(5, 161, 85, 124).into(),
                 #[allow(clippy::unwrap_used)] // Value is manually verified.
                 OnionAddrV3::from_str(
                     "rosarad5bxgdlgjnzzjygnsxrwxmoaj4vn7xinlstwglxvyt64jlnhyd.onion",