Simplify usage of pre-remove role (#8334)

- Use builtin task scheduling of ansible (same task on each host)
  instead of manual looping on master

Benefits:
- One less play in remove-node.yml playbook
- Parralel node drain
- Drain parameters (timeout, grace period, retries,
  allow_ungraceful_removal) can be adjusted separately for each node
  with ansible variables

remove-node.yml

@@ -21,13 +21,6 @@
         msg: "Delete nodes confirmation failed"
       when: pause_result.user_input | default('yes') != 'yes'
 
-- hosts: kube_control_plane[0]
-  gather_facts: no
-  environment: "{{ proxy_disable_env }}"
-  roles:
-    - { role: kubespray-defaults }
-    - { role: remove-node/pre-remove, tags: pre-remove }
-
 - name: Gather facts
   import_playbook: facts.yml
 
@@ -36,6 +29,7 @@
   environment: "{{ proxy_disable_env }}"
   roles:
     - { role: kubespray-defaults, when: reset_nodes|default(True)|bool }
+    - { role: remove-node/pre-remove, tags: pre-remove }
     - { role: remove-node/remove-etcd-node }
     - { role: reset, tags: reset, when: reset_nodes|default(True)|bool }