Distroless warnings

When using a distroless and minimal image, grype output shows warnings of missing files, e.g.
```
WARN parsing dpkg status: extracting key-value from line: [...] usr/lib/os-release err: cannot parse field from line:
[...] usr/lib/os-release' form-lib=syft
```

Is there a way to mute these false positives, as these are expected to be mising?

Start by reproducing the warning with a distroless or minimal image in the GitHub Action workflow, then trace how the scan output is surfaced. Done means expected missing-file warnings can be muted without suppressing unrelated warnings.

Written by the indexing model from the issue text.