ci: Manually download blivet-gui playbooks for revdeps tests

The playbook is now split into a playbook and separate file with
tasks. We need both and prepare cannot download two files.

plans/blivet-gui.fmf

@@ -17,10 +17,17 @@ prepare:
       # amazon-ec2-utils creates sda -> nvme symlinks breaking our tests
       - if rpm -q amazon-ec2-utils; then rpm -e --verbose amazon-ec2-utils && udevadm trigger /dev/nvme* ;fi
 
+  - name: download
+    how: shell
+    script:
+      - sudo dnf install -y 'curl'
+      - curl -Ok https://raw.githubusercontent.com/storaged-project/blivet-gui/main/misc/install-test-dependencies.yml
+      - curl -Ok https://raw.githubusercontent.com/storaged-project/blivet-gui/main/misc/blivet-gui-tasks.yml
+
   - name: ansible
     how: ansible
     playbook:
-        - https://raw.githubusercontent.com/storaged-project/blivet-gui/main/misc/install-test-dependencies.yml
+        - install-test-dependencies.yml
 
 discover:
     how: shell