QA:Testcase partitioning webui guided multi select

Associated release criterion
This test case is associated with the Basic_Release_Criteria#disk-selection 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 you can successfully select a particular target device during a guided partitioning-based system installation, using the webui-based installer.

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 that uses the webui-based installer - e.g. Fedora Workstation live, on Fedora 42 and above.
2. Ensure at least one of the devices contains some form of data (for later verification that it was left alone).

How to test

1. Boot the webui-based installer using any available means, e.g. Fedora Workstation live on Fedora 42+.
2. Proceed to the installer's "Installation method" screen, making sensible choices.
3. Select only one of the target devices you prepared as the "Destination" (if you have one populated and one empty disk, choose the empty one).
4. Ensure the "Use entire disk" option is selected, and click Next.
5. Complete the installation process, making sensible selections for all other installer options.
6. Boot the installed system.

Expected Results

1. The device(s) not selected as install target disks should not be touched by the installation process.
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.