Add Infisical token-reviewer RBAC for Kubernetes Auth

Phase 2 Step 2: dedicated SA infisical-token-reviewer bound to
system:auth-delegator (TokenReview), explicit long-lived SA token Secret
(k8s 1.34 doesn't auto-create). ArgoCD ignores /data so selfHeal won't
strip the controller-populated token. Token value never committed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

infisical-operator-rbac/secret-token-reviewer.yaml

@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: infisical-token-reviewer
+  namespace: infisical-operator
+  annotations:
+    kubernetes.io/service-account.name: infisical-token-reviewer
+type: kubernetes.io/service-account-token
+# .data is populated by the cluster token controller — never committed to git.
+# ArgoCD ignores /data on this Secret (see application-infisical-operator-rbac.yaml).