cmd/k8s-operator: add priorityClassName support to helm chart (#19236)

Expose priorityClassName in the operator Helm chart values so that
users can configure the operator deployment with a Kubernetes
PriorityClass. This prevents the operator pods from being preempted
by lower-priority workloads.

Fixes #19235

Signed-off-by: Bjorn Stange <bjorn.stange@expel.io>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cmd/k8s-operator/deploy/chart/templates/deployment.yaml

@@ -146,3 +146,6 @@ spec:
       tolerations:
         {{- toYaml . | nindent 8 }}
       {{- end }}
+      {{- with .Values.operatorConfig.priorityClassName }}
+      priorityClassName: {{ . }}
+      {{- end }}

cmd/k8s-operator/deploy/chart/values.yaml

@@ -72,6 +72,8 @@ operatorConfig:
 
   affinity: {}
 
+  priorityClassName: ""
+
   podSecurityContext: {}
 
   securityContext: {}