feat: add ExternalSecret for SonarQube monitoring passcode

manifest/sonarqube/templates/external-secret.yaml

@@ -0,0 +1,17 @@
+apiVersion: external-secrets.io/v1
+kind: ExternalSecret
+metadata:
+  name: sonarqube-monitoring-passcode
+  namespace: {{ .Release.Namespace }}
+spec:
+  refreshInterval: 1h
+  secretStoreRef:
+    name: vault-backend
+    kind: ClusterSecretStore
+  target:
+    name: sonarqube-monitoring-passcode
+  data:
+    - secretKey: monitoringPasscode
+      remoteRef:
+        key: sonarqube-monitoringpasscode
+        property: monitoringPasscode