chore: improve destroy flow: ignore no existing sg module

prerequisites.tf

@@ -55,7 +55,7 @@ locals {
   subnet_ids                    = length(var.subnet_ids) == 0 ? module.network[0].subnet_ids : var.subnet_ids
   additional_subnet_id          = var.create_alb ? var.alb_additional_subnet_id == "" ? module.network[0].additional_subnet_id : var.alb_additional_subnet_id : ""
   vpc_id                        = length(var.subnet_ids) == 0 ? module.network[0].vpc_id : var.vpc_id
-  sg_ids                        = length(var.sg_ids) == 0 ? module.security_group[0].sg_ids : var.sg_ids
+  sg_ids                        = length(var.sg_ids) == 0 && length(module.security_group) > 0 ? module.security_group[0].sg_ids : var.sg_ids
   alb_sg_ids                    = var.create_alb ? length(var.alb_sg_ids) > 0 ? var.alb_sg_ids : local.sg_ids : []
   instance_iam_profile_arn      = var.instance_iam_profile_arn == "" ? module.iam[0].instance_iam_profile_arn : var.instance_iam_profile_arn
   lambda_iam_role_arn           = var.lambda_iam_role_arn == "" ? module.iam[0].lambda_iam_role_arn : var.lambda_iam_role_arn