Fix - Search root filesystem device (#8366)

roles/kubernetes/preinstall/tasks/0120-growpart-azure-centos-7.yml

@@ -7,6 +7,10 @@
     name: cloud-utils-growpart
     state: present
 
+- name: Gather mounts facts
+  setup:
+    gather_subset: 'mounts'
+
 - name: Search root filesystem device
   vars:
     query: "[?mount=='/'].device"