feat: migrate CSI drivers to dedicated storage project (#45)

- Migrate csi-cephfs from Terraform to ArgoCD
- Migrate csi-cephrbd from Terraform to ArgoCD
- Create dedicated storage project and ApplicationSet for CSI drivers
- Add csi-* pattern matching in storage ApplicationSet
- Remove CSI apps from platform project to separate concerns

Reviewed-on: #45

apps/base/csi-cephrbd/vaultauth.yaml

@@ -0,0 +1,18 @@
+---
+apiVersion: secrets.hashicorp.com/v1beta1
+kind: VaultAuth
+metadata:
+  name: ceph-csi-rbd
+  namespace: csi-cephrbd
+spec:
+  method: kubernetes
+  mount: k8s/au/syd1
+  vaultConnectionRef: vso-system/default
+  allowedNamespaces:
+    - csi-cephrbd
+  kubernetes:
+    role: ceph-csi
+    serviceAccount: ceph-csi-rbd-csi-rbd-provisioner
+    audiences:
+      - vault
+    tokenExpirationSeconds: 600