Add Kyverno PolicyExceptions for third-party charts

ArgoCD, NetBird operator, and Scylla Manager are upstream Helm charts
that don't set resource limits, probes, drop-all capabilities, or
disable SA token automount. These audit-mode policy violations inflated
the cumulative Prometheus failure counter to ~3800.

- argocd: exempt from require-resource-limits, require-probes
- netbird-operator: exempt from require-resource-limits,
  disallow-automount-sa-token, require-probes
- scylla-manager: exempt from require-drop-all-capabilities,
  disallow-automount-sa-token

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

infrastructure/kyverno/policies/argocd-exception.yaml

@@ -0,0 +1,27 @@
+# ArgoCD upstream Helm chart does not set resource limits or probes on
+# several components. These are audit-mode policies and ArgoCD is a
+# third-party chart we don't control.
+apiVersion: kyverno.io/v2
+kind: PolicyException
+metadata:
+  name: argocd-exemption
+  namespace: kyverno
+spec:
+  exceptions:
+    - policyName: require-resource-limits
+      ruleNames:
+        - require-limits
+        - autogen-require-limits
+    - policyName: require-probes
+      ruleNames:
+        - require-probes
+  match:
+    any:
+      - resources:
+          kinds:
+            - Deployment
+            - StatefulSet
+            - ReplicaSet
+            - Pod
+          namespaces:
+            - argocd