[BUG] epicli upgrade of cluster created by Epiphany v0.6 fails on [preflight_facts : Store preflight facts] task

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Describe the bug
Error message:
PermissionError: [Errno 1] Operation not permitted: /shared/build/06hatodevawrhcalico/vault//../preflight_facts.yml

Cause:

root@vm-bld-node-001:~# ls -la /tmp/build/epi-cli/build/06hatodevawrhcanal/
total 104
drwxr-xr-x  6 operations operations  4096 Dec  3 19:01 .
drwxr-xr-x 84 operations operations 12288 Dec  3 11:22 ..
drwxr-xr-x  5 operations operations  4096 Dec  3 19:01 ansible
drwxr-xr-x  5 operations operations  4096 Dec  3 19:01 backup_1606953697690
-rw-r--r--  1 operations operations  4481 Dec  3 19:01 inventory
-rw-r--r--  1 operations operations 60601 Dec  2 17:54 manifest.yml
-rw-r--r--  1 root       root         446 Dec  2 17:56 preflight_facts.yml
drwxr-xr-x  2 operations operations  4096 Dec  2 17:54 terraform
drwxr-xr-x  2 operations operations  4096 Dec  2 18:32 vault

PR #1825 added the mode parameter to the Store preflight facts task:

- name: Store preflight facts
  delegate_to: localhost
  become: false
  run_once: true
  copy:
    dest: "{{ vault_location }}/../preflight_facts.yml"
    mode: u=rw,g=r,o=

and the become parameter has been added in v0.7.

How to reproduce
Steps to reproduce the behavior:

1. Deploy cluster using epici v0.6
2. Run epicli upgrade using code from develop branch.

Expected behavior
epicli upgrade should succeed.

Environment

• Cloud provider: All
• OS: All

Additional context
n/a

[przemyslavic]

The fix for handling a permission issue on preflight_facts.yml works correctly.
The cluster has been successfully upgraded to develop.
Tested:
✔️ 0.6 -> develop
✔️ 0.6 HA -> develop