[Feature Request] Add support for client-go-credential-plugins

[anandsahil]

for newer versions of the API eg. client.authentication.k8s.io/v1alpha1 we need
https://kubernetes.io/docs/reference/access-authn-authz/authentication/#client-go-credential-plugins

[solvip]

This doesn't directly resolve this, but if you need this for e.g. development purposes, you can work around this by doing a kubectl proxy in a terminal and then point KubernetesClient towards the served address:

% kubectl proxy
Starting to serve on 127.0.0.1:8001

    KubernetesClient[IO](KubeConfig(server = Uri.unsafeFromString("http://localhost:8001")))