fix(validation): add CIDR prefix range check and Ubuntu version validation

roles/global_defaults/tasks/validation.yml

@@ -130,8 +130,15 @@
         ) or (
           os == "rhel"
           and (os_version | string) is match("^(8|9|10)(\\.\\d+)?$")
+        ) or (
+          os == "ubuntu"
+          and (os_version | string) is match("^(2[0-9])\\.04$")
+        ) or (
+          os == "ubuntu-lts"
+          and (os_version | string) is match("^(2[0-9])\\.04$")
         ) or (
           os in ["ubuntu", "ubuntu-lts"]
+          and (os_version | default('') | string | length) == 0
         ) or (
           os in ["alpine", "archlinux", "opensuse", "void"]
         )
@@ -359,7 +366,8 @@
     that:
       - system_cfg.network.prefix is defined
       - (system_cfg.network.prefix | int) > 0
-    fail_msg: "system.network.prefix is required when system.network.ip is set."
+      - (system_cfg.network.prefix | int) <= 32
+    fail_msg: "system.network.prefix must be between 1 and 32 when system.network.ip is set."
     quiet: true
 
 - name: Validate network interfaces entries