Upgrade Ceph to v19.2.3, fix netbird webhook failurePolicy

- Ceph v19.2.0 has BlueStore::expand_devices assertion bug that
  crashes OSD expand-bluefs init containers. v19.2.3 includes fixes.
- NetBird operator webhook failurePolicy: Fail blocks all pod
  creation cluster-wide when webhook service is unreachable.
  Changed to Ignore.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

infrastructure/netbird-operator/values.yaml

@@ -24,7 +24,7 @@ ingress:
 # Webhook TLS via cert-manager (already deployed)
 webhook:
   enableCertManager: true
-  failurePolicy: Fail
+  failurePolicy: Ignore
 
 operator:
   replicaCount: 1

infrastructure/rook-ceph/cluster-values.yaml

@@ -27,7 +27,7 @@ monitoring:
 cephClusterSpec:
   # Ceph version - Squid (v19)
   cephVersion:
-    image: quay.io/ceph/ceph:v19.2.0
+    image: quay.io/ceph/ceph:v19.2.3
     allowUnsupported: false
 
   # Data directory on host