This test was failing regularly with the following error showing up on all pods:

```
FailedCreatePodSandbox
```

after doing some digging, it seems that this error is always CNI related. I found these docs on the k8s website about running containerd in minikube:

https://kubernetes.io/docs/setup/learning-environment/minikube/

which says the flags `--network-plugin=cni` and `--enable-default-cni` should be set with running containerd. I tried passing those flags in, and ran this test locally 3x. It passed everytime, so I'm hoping this fixes the flake.

Also, the dashboard addon wasn't being enabled because of this flow:

```
minikube stop
minikube addons enable dashboard
minikube start
```

but on start, dashboard was skipped because it seemed like it had already been enabled.