Move VolSync resources to storage directory

Relocated VolSync's volumesnapshotclass.yaml and kustomization.yaml from controllers/volsync to storage/volsync, updating references in kustomization files accordingly. Added pvc-plumber to ArgoCD appset. This improves organization by grouping storage-related resources together.

Author: mitchross

infrastructure/controllers/argocd/apps/infrastructure-appset.yaml

@@ -20,6 +20,7 @@ spec:
       - path: infrastructure/controllers/nvidia-gpu-operator
       - path: infrastructure/controllers/postgres-operator
       - path: infrastructure/controllers/reloader
+      - path: infrastructure/controllers/pvc-plumber
       - path: infrastructure/controllers/kyverno
       - path: infrastructure/networking/cloudflared
       - path: infrastructure/networking/coredns

infrastructure/controllers/volsync/kustomization.yaml

@@ -5,6 +5,7 @@ resources:
   - namespace.yaml
   - externalsecret.yaml
   - rustfs-credentials.yaml
+  - volumesnapshotclass.yaml
 helmCharts:
   - name: volsync
     repo: https://backube.github.io/helm-charts