fn reconcile_uki_candidates(
expected: &ExpectedComposefsDigest,
expected_ids: ExpectedBootImageIds,
find_matching: impl FnMut(&Sha512HashValue) -> Result<BootImageMatch<Sha512HashValue>>,
) -> Result<RecoveredBootImage>Expand description
The repository-independent part of ensure_correct_composefs_digest:
every UKI candidate must name a boot image of an acceptable format, found
either among expected_ids or via find_matching.