Update variable checks for network_type

Author: oZakari

alz/azuredevops/variables.tf

@@ -99,9 +99,13 @@ variable "bootstrap_location" {
 }
 
 variable "network_type" {
-  description = "The network type for the deployment (e.g. 'hubNetworking' or 'vwanConnectivity')"
+  description = "The network type for the deployment. Valid values: 'hubNetworking', 'vwanConnectivity', or '' (empty string for no networking)"
   type        = string
   default     = ""
+  validation {
+    condition     = var.network_type == "" || var.network_type == "hubNetworking" || var.network_type == "vwanConnectivity"
+    error_message = "The network_type must be either 'hubNetworking', 'vwanConnectivity', or '' (empty string for no networking)"
+  }
 }
 
 variable "azure_devops_personal_access_token" {

alz/github/variables.tf

@@ -99,9 +99,13 @@ variable "bootstrap_location" {
 }
 
 variable "network_type" {
-  description = "The network type for the deployment (e.g. 'hubNetworking' or 'vwanConnectivity')"
+  description = "The network type for the deployment (e.g. 'hubNetworking' or 'vwanConnectivity'). Leave empty for no networking."
   type        = string
   default     = ""
+  validation {
+    condition     = var.network_type == "" || var.network_type == "hubNetworking" || var.network_type == "vwanConnectivity"
+    error_message = "The network_type must be either 'hubNetworking', 'vwanConnectivity', or an empty string (for no networking). Note: values are case-sensitive."
+  }
 }
 
 variable "github_personal_access_token" {

alz/local/variables.tf

@@ -88,9 +88,13 @@ variable "bootstrap_location" {
 }
 
 variable "network_type" {
-  description = "The network type for the deployment (e.g. 'hubNetworking' or 'vwanConnectivity')"
+  description = "The network type for the deployment (e.g. 'hubNetworking' or 'vwanConnectivity'). Leave empty for no networking."
   type        = string
   default     = ""
+  validation {
+    condition     = var.network_type == "" || var.network_type == "hubNetworking" || var.network_type == "vwanConnectivity"
+    error_message = "The network_type must be either 'hubNetworking', 'vwanConnectivity', or an empty string (for no networking). Note: values are case-sensitive."
+  }
 }
 
 variable "on_demand_folder_repository" {