feat: Add autoscaling_group_tags variable to self-managed-node-groups (#2084)

Co-authored-by: Bryant Biggs <bryantbiggs@gmail.com>

modules/self-managed-node-group/main.tf

@@ -400,6 +400,16 @@ resource "aws_autoscaling_group" "this" {
     }
   }
 
+  dynamic "tag" {
+    for_each = var.autoscaling_group_tags
+
+    content {
+      key                 = tag.key
+      value               = tag.value
+      propagate_at_launch = false
+    }
+  }
+
   timeouts {
     delete = var.delete_timeout
   }