refactor!: switch hosts variables to a flat layout

collections/ansible_collections/nullified/infrastructure/roles/security/defaults/main.yml

@@ -1,30 +1,18 @@
 ---
-security:
-  apt:
-    force_https: true
-    https_ignore_list: []
-  clamav:
-    version: 1.2.1
-  firewall:
-    enable: true
-    nat:
-      policy:
-        prerouting: accept
-        input: accept
-        output: accept
-        postrouting: accept
-    mangle:
-      drop_privatenets: true
-      policy:
-        prerouting: accept
-        output: accept
-        forward: drop
-        postrouting: accept
-    filter:
-      policy:
-        input: drop
-        output: drop
-        forward: drop
-
-custom_security: {}
-recursive_combine: true
+security_apt_force_https: true
+security_apt_https_ignore_list: []
+security_clamav_version: 1.2.1
+security_firewall_enabled: true
+security_firewall_filter_policy_forward: drop
+security_firewall_filter_policy_input: drop
+security_firewall_filter_policy_output: drop
+security_firewall_mangle_drop_privatenets: true
+security_firewall_mangle_policy_forward: drop
+security_firewall_mangle_policy_output: accept
+security_firewall_mangle_policy_postrouting: accept
+security_firewall_mangle_policy_prerouting: accept
+security_firewall_nat_policy_input: accept
+security_firewall_nat_policy_output: accept
+security_firewall_nat_policy_postrouting: accept
+security_firewall_nat_policy_prerouting: accept
+security_ssh_port: 22