Automatic merge from submit-queue
[kubelet] Fix oom-score-adj policy in kubelet
Fixes#32238
We have been having this regression since v1.3. It is critical for GKE/GCE deployments of k8s because docker daemon has a high likelihood of being OOM killed which will end up nuking all containers.
The reason for moving from mnt to pid is that docker daemon moves itself into a new mnt namespace with systemd based deployments.
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