Identify files based on their contents in Filebeat

[kvch]

Now multiple options are available to identify files in Filebeat: native, path and inode_marker since #18748. These options provide a quick method to generate an identifier for a file. However, in some use cases or on platforms these might not be sufficient.

More advanced identification can be implemented by fingerprinting full or partial contents of a file.

Follow up issue of #13492

[elasticmachine]

Pinging @elastic/integrations-services (Team:Services)

[botelastic]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[jlind23]

Backlog grooming: Closing for now.