CI: K8sServicesTest Checks service across nodes Supports IPv4 fragments failing with endpoint routes enabled

[pchaigno]

The fragment tracking test is currently failing on GKE, with zero fragments received at the destination. The issue can be easily reproduced by enabling test Supports IPv4 fragments on GKE.

Related: #14639

[pchaigno]

I'm hitting the same error if I run the test on Packet nodes with per-endpoint routes enabled by default:

    Failed to account for IPv4 fragments to 10.97.69.6 (in)
    Expected
        <[]int | len:2, cap:2>: [0, 8]
    To satisfy at least one of these matchers: [%!s(*matchers.EqualMatcher=&{[0 4]}) %!s(*matchers.EqualMatcher=&{[4 0]})]

I suspect both are the same issue with per-endpoint routes as the common cause (they are enabled by default on GKE).

Updating the title accordingly.