Enable containerd test-handler runtimeclass for k/k e2e tests

[upodroid]

Some k/k e2e tests require the test-handler RuntimeClass to be configured.

https://testgrid.k8s.io/sig-cluster-lifecycle-kubeup-to-kops#ci-kubernetes-e2e-cos-gce-canary&include-filter-by-regex=RuntimeClass

https://testgrid.k8s.io/sig-cluster-lifecycle-kubeup-to-kops#ci-kubernetes-e2e-cos-gce-serial-canary&include-filter-by-regex=RuntimeClass

Tests got skipped because it is missing.

kubeup behaviour:

https://github.com/kubernetes/kubernetes/blob/9ae55e98868d78a7103358e1feb7d15b8403d0fa/cluster/gce/gci/configure-helper.sh#L3225

[upodroid]

/test pull-kops-kubernetes-e2e-cos-gce
/test pull-kops-kubernetes-e2e-cos-gce-serial

[upodroid]

/test pull-kops-kubernetes-e2e-cos-gce-serial

[hakman]

@upodroid Is this still needed with #16067 being merged?

[upodroid]

We do. Fixed the diff

[justinsb]

I think it's a cobra / viper bug. It doesn't allow for quotes in a string slice var... I think we may be able to work around by using our own string slice parser in cobra, I'll take a look

[justinsb]

Ah, and it's been reported upstream but not fixed: spf13/pflag#370

[justinsb]

Hoping that #16125 will allow for writing this naturally e.g.

go run ./cmd/kops create cluster foo.k8s.local --zones us-east-2a --set 'cluster.spec.containerd.configAdditions=plugins."io.containerd.grpc.v1.cri".containerd.runtimes.test-handler.runtime_type=io.containerd.runc.v2' 

[upodroid]

/test pull-kops-kubernetes-e2e-cos-gce-serial

[k8s-ci-robot]

@upodroid: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-kops-kubernetes-e2e-cos-gce	b5a64a9	link	false	/test pull-kops-kubernetes-e2e-cos-gce
pull-kops-kubernetes-e2e-cos-gce-serial	99b5fdf	link	false	/test pull-kops-kubernetes-e2e-cos-gce-serial

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[upodroid]

This is ready to be merged now @hakman

[k8s-ci-robot]

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