fix ansible password authentication (#6907)

* copying ssh key no longer required, works with password auth
* use copy module instead of synchronize (which requires sshpass)
* less tasks and always changed tasks

roles/download/tasks/prep_kubeadm_images.yml

@@ -22,14 +22,11 @@
     - not skip_kubeadm_images|default(false)
 
 - name: prep_kubeadm_images | Copy kubeadm binary from download dir to system path
-  synchronize:
+  copy:
     src: "{{ local_release_dir }}/kubeadm-{{ kubeadm_version }}-{{ image_arch }}"
     dest: "{{ bin_dir }}/kubeadm"
-    compress: no
-    perms: yes
-    owner: no
-    group: no
-  delegate_to: "{{ inventory_hostname }}"
+    mode: 0755
+    remote_src: true
 
 - name: prep_kubeadm_images | Set kubeadm binary permissions
   file: