Load Valid Contexts from Kubeconfig Despite Errors

[joaquimrocha]

In the testing for the latest release I have noticed that Headlamp was not loading any of the clusters in Mac and Windows (somehow in WSL it worked, maybe because the kubeconfig is different or because I didn't test correctly).

So we ended up having to revert the related commit: https://github.com/headlamp-k8s/headlamp/pull/1627

We need to check what is wrong in that code. I will share my (sanitized) kubeconfig privately.