Allow Capabilities to ignore specific files in scan

[FernandoRojo]

presently we are able to ignore scanning all files under a directory by passing in --IgnoreDirectories "path" or --DirectoryExclusionList "pathGlob",

However there is sometimes the need to only exempt specific files from being scanned, while still scanning the rest of the directory. Filtering in the DetectorProcessingService applies to the path levels only, so this will require a new approach rather than relying on the --IgnoreDirectories argument.