lxcmap: Fix invalid dumping of IPv4 entries
lxcmap: Fix invalid dumping of IPv4 entries

This would previously format IPv4 addresses in the IPv6 form, which
would lead to the following errors:

  msg="Unable to delete obsolete host IP from BPF map" error="Unable to
  delete element from map cilium_lxc: no such file or directory"

Fix this by using the appropriate function to convert the address into
the right form.

Fixes: #5678

Signed-off-by: Joe Stringer <16a9a54ddf4259952e3c118c763138e83693d7fd@covalent.io>

tgraf/cilium,scanf/cilium,cilium/cilium,scanf/cilium,michi-covalent/cilium,tklauser/cilium,tklauser/cilium,michi-covalent/cilium,tgraf/cilium,michi-covalent/cilium,tgraf/cilium,cilium/cilium,michi-covalent/cilium,tgraf/cilium,scanf/cilium,tklauser/cilium,michi-covalent/cilium,tgraf/cilium,cilium/cilium,cilium-team/cilium,scanf/cilium,tklauser/cilium,tklauser/cilium,cilium/cilium,cilium/cilium,tgraf/cilium,scanf/cilium,cilium-team/cilium,scanf/cilium,scanf/cilium