T7878: ci-license-scan: Manually check whitelisted files

Files whitelisted in debian/apertis/copyright.whitelist are used to instruct the scanner process not to raise an error which allows the pipeline to succeed and merge the change. However, as a side effect, the entries in debian/apertis/copyright with offending licenses are being removed, dropping important information.

BOM generator for Apertis binary packages needs the whole information. scan-copyright scanner must be called without a whitelist, so the pipeline keeps license information for all the present files in the source package.

This MR adapts ci-license-scan script to generate license information for all the files, without failing on whitelisted offending ones.