Duplicate Files in Different Bundles Get Skipped

@elimw it looks like a project-specific solution. Also, it doesn't cover the following cases:

• When we use other media types for migration - e.g. files.
• When the file wasn't mapped.
• Translations.

I provided another solution for that. We have the migrate_file_to_media_mapping mapping table, why not use it?
- Created event subscriber to add newly created media entities to the mapping table, so we will exactly to know which media matches the current file.
- For translation use file_id_lookup instead of the migration_lookup. Thus, we also solve this problem for translations.

Tested the module after the fixes on the empty and real projects.

P.S. Keeping a ticket in review status to allow someone else to review it. If the task remains unchanged for 2 weeks, the solution will be automatically added to the dev branch.

Automatically closed - issue fixed for 2 weeks with no activity.