Description of problem:
When we are trying to delete nodes that are unreachable using openstack overcloud delete command, it is failing. This is even after incorporating the patches mentioned in https://bugzilla.redhat.com/show_bug.cgi?id=1843721 (https://review.opendev.org/#/c/723382/) as well as https://github.com/openstack/tripleo-heat-templates/commit/5843a7667c93ded7c7ed3e59d408ddd5ca4876fd#diff-fdfa9108b5c67b2c4ce1dae2a05ec0c2R1175.

The problem is the resulting scale_playbook.yaml generated has scale_ignore_unreachable argument as a parameter for the play

- hosts: overcloud
  name: Scaling
  # NOTE(cloudnull): This is set to true explicitly so that we have up-to-date facts
  #                  on all overcloud when performing a scaling operation.
  #                  Without up-to-date facts, we're creating a potential failure
  #                  scenario.
  gather_facts: true
  scale_ignore_unreachable: true
  become: false



Version-Release number of selected component (if applicable):
16.1

How reproducible:
100%

Steps to Reproduce:
1. Delete an unreachable node using openstack overcloud node delete
2.
3.

Actual results:
Scale down fails

Expected results:
Scale down should succeed

Additional info: