Bugfix/11936 - backup: "{{ leave_etc_backup_files }}" (#11937)

* Adding the var: leave_etc_backup_files

* Fix for #11936 - backup: "{{ leave_etc_backup_files }}"

roles/kubernetes/preinstall/tasks/0090-etchosts.yml

@@ -25,7 +25,7 @@
     block: "{{ hostvars.localhost.etc_hosts_inventory_block }}"
     state: "{{ 'present' if populate_inventory_to_hosts_file else 'absent' }}"
     create: true
-    backup: true
+    backup: "{{ leave_etc_backup_files }}"
     unsafe_writes: true
     marker: "# Ansible inventory hosts {mark}"
     mode: "0644"
@@ -36,7 +36,7 @@
     regexp: ".*{{ apiserver_loadbalancer_domain_name }}$"
     line: "{{ loadbalancer_apiserver.address }} {{ apiserver_loadbalancer_domain_name }}"
     state: present
-    backup: true
+    backup: "{{ leave_etc_backup_files }}"
     unsafe_writes: true
   when:
     - populate_loadbalancer_apiserver_to_hosts_file
@@ -74,7 +74,7 @@
         line: "{{ item.key }} {{ item.value | join(' ') }}"
         regexp: "^{{ item.key }}.*$"
         state: present
-        backup: true
+        backup: "{{ leave_etc_backup_files }}"
         unsafe_writes: true
       loop: "{{ etc_hosts_localhosts_dict_target | default({}) | dict2items }}"