Connectivity Test hack for k8s exec failures: ping special case regex does not work for IPv6

[bimmlerd]

The hack in #1857 works, somewhat, for IPv4. However, amazingly, ping for IPv6 has a slightly different output format:

$ ping 2606:4700:4700::1111             
PING 2606:4700:4700::1111(2606:4700:4700::1111) 56 data bytes
64 bytes from 2606:4700:4700::1111: icmp_seq=1 ttl=58 time=4.57 ms

vs

david@panther:~/wrk -$ ping 1.1.1.1             
PING 1.1.1.1 (1.1.1.1) 56(84) bytes of data.
64 bytes from 1.1.1.1: icmp_seq=1 ttl=58 time=2.84 ms

Note bytes of data vs data bytes 🤦