- Replaced string stripping with `shlex.split()` to properly
handle values in the os-release file;
- This ensures cleaner and more accurate key-value assignments,
follwing a broader set of shell-like parsing rules;
- Add os-release file for Fedora CoreOS 40 for testing.
Signed-off-by: Renata Ravanelli <rravanel@redhat.com>
