feat(longhorn): Enable automatic engine migrations for volumes

References:
https://longhorn.io/docs/1.2.3/references/settings/#concurrent-automatic-engine-upgrade-per-node-limit

infrastructure/longhorn/release.yaml

@@ -23,6 +23,8 @@ spec:
         systemDefaultRegistry: docker.io
     persistence:
       defaultClassReplicaCount: 2
+    defaultSettings:
+      concurrentAutomaticEngineUpgradePerNodeLimit: 1
     longhornManager:
       priorityClass: system-cluster-critical
     longhornDriver: