fix(argocd): switch to ingress-nginx, fix shared resource warning, add insecure mode

cluster/platform/argocd/argocd-params.yaml

@@ -0,0 +1,11 @@
+# ------------------------------------------------------------------------------
+# ArgoCD Server Parameters
+# Sets server.insecure=true so TLS is terminated at ingress, not argocd-server
+# ------------------------------------------------------------------------------
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: argocd-cmd-params-cm
+  namespace: argocd
+data:
+  server.insecure: "true"