Disable Modsecurity from internal processing which affects large ingresses (#10316)

* Disable Modsecurity from interanl processing

* Fix modsecurity check logic

rootfs/etc/nginx/template/nginx.tmpl

@@ -709,6 +709,11 @@ http {
 
     # default server, used for NGINX healthcheck and access to nginx stats
     server {
+        # Ensure that modsecurity will not run on an internal location as this is not accessible from outside
+        {{ if $all.Cfg.EnableModsecurity }}
+        modsecurity off;
+        {{ end }}
+
         listen 127.0.0.1:{{ .StatusPort }};
         set $proxy_upstream_name "internal";