Remove nessus app and fix envoy-gateway OCI chart bug

- Delete nessus Application CRD, manifests, and bootstrap script
- Vendor envoy-gateway Helm chart (v1.6.3) locally to work around
  ArgoCD v3.3.3 Docker Hub OCI resolution bug
- Re-enable auto-sync for envoy-gateway

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

charts/envoy-gateway/templates/infra-manager-rbac.yaml

@@ -0,0 +1,56 @@
+{{ if .Values.config.envoyGateway.provider.kubernetes }}
+{{ $kube := .Values.config.envoyGateway.provider.kubernetes }}
+{{ if and (not $kube.watch) ($kube.deploy) (eq $kube.deploy.type "GatewayNamespace") }}
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: {{ include "eg.fullname" $ }}-cluster-infra-manager
+  labels:
+  {{- include "eg.labels" $ | nindent 4 }}
+rules:
+{{ include "eg.rbac.infra.basic" . }}
+{{ include "eg.rbac.infra.tokenreview" . }}
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ include "eg.fullname" $ }}-cluster-infra-manager
+  labels:
+  {{- include "eg.labels" $ | nindent 4 }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: '{{ include "eg.fullname" $ }}-cluster-infra-manager'
+subjects:
+- kind: ServiceAccount
+  name: 'envoy-gateway'
+  namespace: '{{ $.Release.Namespace }}'
+---
+{{ end }}
+{{ end }}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: {{ include "eg.fullname" . }}-infra-manager
+  namespace: '{{ .Release.Namespace }}'
+  labels:
+  {{- include "eg.labels" . | nindent 4 }}
+rules:
+{{ include "eg.rbac.infra.basic" . }}
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: {{ include "eg.fullname" . }}-infra-manager
+  namespace: '{{ .Release.Namespace }}'
+  labels:
+  {{- include "eg.labels" . | nindent 4 }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: '{{ include "eg.fullname" . }}-infra-manager'
+subjects:
+- kind: ServiceAccount
+  name: 'envoy-gateway'
+  namespace: '{{ .Release.Namespace }}'