Network outage: Test can't connect to juju controller

# This is a catch all issue to track such failures
Some tests fail because of

```
ERROR cannot connect to k8s api server; try running 'juju update-k8s --client ': starting proxy for api connection: connecting k8s proxy:
Get "https://10.141.134.192:443/api/v1/namespaces/controller-19539094030-251120134904/services/controller-service": dial tcp 10.141.134.192:443: connect: no route to host"
```

This isn't due to any charm or product because they are not even deployed

Start from the reported test failure and the Kubernetes API connection error, then check the suggested `juju update-k8s --client ` command. No specific test or file is named; done would mean the affected tests can connect to the Juju controller without this network error.

Written by the indexing model from the issue text.