7 failures reported in net:fcnal-test.sh on Kinetic

[Po-Hsu Lin]

This is not a regression, the test was skipped in the old days due to the lack of `nettest` command (bug 2006391)

Unlike bug 2006716 ("5 failures reported in net:fcnal-test.sh on Jammy") there are 7 common failures reported on Kinetic

 #########################################################################
 # IPv4 ping
 #########################################################################
 # With VRF
 # SYSCTL: net.ipv4.raw_l3mdev_accept=1
 # TEST: ping local, VRF bind - VRF IP [FAIL]
 # TEST: ping local, device bind - ns-A IP [FAIL]

 # SYSCTL: net.ipv4.ping_group_range=0 2147483647
 # SYSCTL: net.ipv4.raw_l3mdev_accept=1
 # TEST: ping local, VRF bind - VRF IP [FAIL]
 # TEST: ping local, device bind - ns-A IP [FAIL]

 #########################################################################
 # IPv6 ping
 #########################################################################
 # With VRF
 # SYSCTL: net.ipv4.ping_group_range=0 2147483647
 # SYSCTL: net.ipv4.raw_l3mdev_accept=1
 # TEST: ping out, vrf device+address bind - ns-B IPv6 LLA [FAIL]

 #########################################################################
 # IPv6/UDP
 #########################################################################
 # No VRF
 # udp_l3mdev_accept disabled
 # SYSCTL: net.ipv4.udp_l3mdev_accept=0
 # TEST: Global server, device client via IP_UNICAST_IF, local connection, with connect() - ns-A loopback IPv6 [FAIL]

 # udp_l3mdev_accept enabled
 # SYSCTL: net.ipv4.udp_l3mdev_accept=1
 # TEST: Global server, device client via IP_UNICAST_IF, local connection, with connect() - ns-A loopback IPv6 [FAIL]

Sometimes it will fail with 8 failures, but the 8th failure looks flaky and can be failing on different test cases:

With K-aws c6g.8xlarge (arm64) and r5.large (amd64) the 8th failure is:
 #########################################################################
 # Use cases
 #########################################################################
 # Ping LLA with multiple interfaces
 # TEST: Pre cycle, ping out ns-B - multicast IP [FAIL]

With K-azure Standard_D2pds_v5 (arm64) the 8th failure is:
 #########################################################################
 # Use cases
 #########################################################################
 # TEST: Post cycle ns-A eth1, ping out ns-B - multicast IP [FAIL]