fix: wrap errors correct when validating kubeconfig
fix: wrap errors correct when validating kubeconfig

This allows to check for specific errors using `errors.Is`.

Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>

Kubernetes-commit: a5647fa417de6d17ba200f1b4bcd2bb28cceb22c

kubernetes/client-go