Add create_before_destroy to Aurora instance

Author: Jon Henry

main.tf

@@ -201,6 +201,11 @@ resource "aws_rds_cluster_instance" "this" {
     update = try(var.instance_timeouts.update, null)
     delete = try(var.instance_timeouts.delete, null)
   }
+
+  lifecycle {
+    create_before_destroy = true
+  }
+
 }
 
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