fix: [DTOSS-11779] the alerts action group id set only when the alerts are enabled (#1773)

fix: the alerts action group id set only when the alerts are enabled

Author: MacMur85

infrastructure/tf-core/sql_server.tf

@@ -28,7 +28,7 @@ module "azure_sql_server" {
 
   # Azure Monitor Alerting
   enable_alerting = var.features.alerts_enabled
-  action_group_id = module.monitor_action_group_performance[0].monitor_action_group.id
+  action_group_id = var.features.alerts_enabled ? module.monitor_action_group_performance[0].monitor_action_group.id : null
 
   sql_uai_name                         = null # not used - deprecate in module
   sql_admin_group_name                 = var.sqlserver.sql_admin_group_name