feat: Allow self in alias records within same zone

Author: wiseelf

main.tf

@@ -149,7 +149,7 @@ resource "aws_route53_record" "this" {
     content {
       evaluate_target_health = each.value.alias.evaluate_target_health
       name                   = each.value.alias.name
-      zone_id                = each.value.alias.zone_id
+      zone_id                = each.value.alias.zone_id == "self" ? local.zone_id : each.value.alias.zone_id
     }
   }