Delete all the document in target

The image recipes include dpkg-excludes to avoid installing documentation for target image. However, this only is applied after the bootstrap process causing some documents to remain in the rootfs.

A partial clean up is done on the last steps of the image generation, erasing /usr/share/doc/*, but there are other places for documents.

Clean up all the folders that are mentioned in dpkg exclusions to save space and to ensure that SBOM which does not support autogenerated files, like man pages, is accurate.

Besides that, fix the security BOM to support compressed metadata.

Signed-off-by: Walter Lozano walter.lozano@collabora.com