REFACTOR(grafana): remove Falco and Traefik UI

- Use Grafana dashboards instead
- Delete falco-ui-secret ExternalSecret
- Delete traefik dashboard IngressRoute

falco/vault/falco-ui-secret.yaml

@@ -1,19 +0,0 @@
-apiVersion: external-secrets.io/v1
-kind: ExternalSecret
-metadata:
-  name: falco-ui-secret
-  namespace: falco
-spec:
-  refreshInterval: 1h
-  secretStoreRef:
-    kind: ClusterSecretStore
-    name: vault-backend
-  target:
-    name: falco-ui-secret
-    creationPolicy: Owner
-  data:
-    - secretKey: FALCOSIDEKICK_UI_USER
-      remoteRef:
-        key: cluster-infrastructure/falco
-        property: UI_USER
-