Minimum client version support

[majst01]

depends on:

• Support minimum client version metal-api#480 and metal-go

[Gerrit91]

This endpoint does not require authentication, so we do not have to re-read the config.

Suggested change

	// We need to reread the written kubeconfig
	err = initConfigWithViperCtx(c)
	if err != nil {
	return err
	}
	resp, err := c.client.Version().Info(version.NewInfoParams(), nil)
	resp, err := c.client.Version().Info(version.NewInfoParams(), clientNoAuth())

By passing nil we use the default auther that we configure in metal-go. To circumvent this, we can do somethings like this:

func clientNoAuth() runtime.ClientAuthInfoWriterFunc {
	noAuth := func(_ runtime.ClientRequest, _ strfmt.Registry) error { return nil }
	return runtime.ClientAuthInfoWriterFunc(noAuth)
}