CI: make /tmp/releases world-readable (#13117)

tests/cloud_playbooks/roles/packet-ci/vars/main.yml

@@ -50,6 +50,8 @@ cloudinit_config: |
       partition: 'none'
   mounts:
     - ['/dev/disk/by-id/virtio-2825A83CBDC8A32D5E', '/tmp/releases']
+  runcmd:
+    - chmod 777 /tmp/releases
 
 ignition_config:
   ignition:
@@ -68,3 +70,9 @@ ignition_config:
         format: ext4
         path: /tmp/releases
         wipeFilesystem: true
+    directories:
+      - path: /tmp/releases
+        # ignition require a integer, so using the octal notation is easier
+        # than noting it in decimal form
+        # yamllint disable-line rule:octal-values
+        mode: 0777