This fixes `talosctl upgrade-k8s`:
```
Get "https://172.21.0.1:6443/api/v1/namespaces/kube-system/pods?labelSelector=k8s-app+%3D+kube-apiserver": read tcp 172.21.0.1:51416->172.21.0.1:6443: read: connection reset by peer
```
The error happens when the `kube-apiserver` is restarted during the
control plane upgrade, and it should be ignored as a transient error.
Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
Looks like tls errors implement the interface, but they are not derived
from the `*net.OpError`, so this check should catch more errors.
Fixes#3457
Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>
This extracts function which was used in upgrade/convert flows to retry
transient errors to the main `kubernetes` package, expands it to ignore
timeout errors, and it is now used to retry errors where applicable in
`pkg/kubernetes`.
Fixes#3403
Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>
