Lorenz Leutgeb 7d6d2e51d8 cli/test: Clean up testing environment ...

This is a small cleanup to path generation during testing.
 1. Separate `rad_home` and `unix_home` to avoid confusion.
 2. Remove now unnecessary `trait HasHome`.
 3. Move setting `$USER` to the environment.
 4. Make paths shorter overall, to fix macOS tests.

2025-10-13 08:56:23 +01:00

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cli/test: Clean up testing environment

2025-10-13 08:56:23 +01:00