QA:Testcase partitioning guided multi empty all

Associated release criterion
This test case is associated with the Fedora_42_Beta_Release_Criteria#guided-partitioning release criterion. If you are doing release validation testing, a failure of this test case may be a breach of that release criterion. If so, please file a bug and nominate it as blocking the appropriate milestone, using the blocker bug nomination page.

Description

This test case tests whether guided partitioning of multiple empty storage devices is successful during system installation.

Setup

1. Prepare a test system with two or more working, supported storage devices of sufficient size for a Fedora install, and a Fedora installation medium.
2. Reformat the target storage devices.

How to test

1. Boot the GTK-based installer using any available means. Do not use Fedora Workstation live on Fedora 41+, as that uses the webui-based installer.
2. Proceed to the installer's main screen, making sensible choices, and enter the Installation Destination screen.
3. Ensure only the blank target devices you prepared are selected as the installation target disks.
4. Ensure the option to let the installer handle partitioning is set, and complete this screen.
5. Complete the installation process, making sensible selections for all other installer options.
6. Boot the installed system.

Expected Results

1. The created partition layout should span all the target devices.
2. The expected partition layout should be created on the target device(s).
3. The install process should complete successfully and the installed system should boot as expected.