New label to be added when creating BMC CRD

[nagadeesh-nagaraja]

Today, the Argora operator creates following labels when it creates the BMC CRD in metal operator.

apiVersion: metal.ironcore.dev/v1alpha1
kind: BMC
metadata:
  creationTimestamp: "2026-03-27T09:52:03Z"
  generation: 2
  labels:
    kubernetes.metal.cloud.sap/bb: ap052
    kubernetes.metal.cloud.sap/cluster: qa-de-1-ironcore
    kubernetes.metal.cloud.sap/cluster-type: cc-ironcore
    kubernetes.metal.cloud.sap/name: node002-ap052
    kubernetes.metal.cloud.sap/platform: gardenlinux
    kubernetes.metal.cloud.sap/role: server
    kubernetes.metal.cloud.sap/type: poweredge-r660
    topology.kubernetes.io/region: qa-de-1
    topology.kubernetes.io/zone: qa-de-1b
...

we would like to add a new label. kubernetes.metal.cloud.sap/nodename: node002 when BMC is created.