ANXKUBE-1353: Apply sysctls automatically with kubelet

sysctl --system can be executed multiple times, so this should be a safe
change. It's also just a soft dependency (Wants instead of Requires), so
even in case of an error, it would not block the startup of kubelet.

It's still unclear why the unit is sometimes not executed and right now,
I assume it has to do something with the network dependences.

Author: koflanx

deploy/osps/default/osp-flatcar-cloud-init.yaml

@@ -550,6 +550,7 @@ spec:
               After={{ .ContainerRuntime }}.service
               {{- if eq .CloudProviderName "anexia" }}
               Requires={{ .ContainerRuntime }}.service rpc-statd.service
+              Wants=apply-sysctl-settings.service
               {{- else }}
               Requires={{ .ContainerRuntime }}.service
               {{- end }}