Don't include lfs_file_locks data in export bundle

What does this MR do?

It excludes data related to the lfs_file_locks table from the export bundle.

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

There is an error when the user tries to import a project that contains this data.

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered
• End-to-end tests pass (package-and-qa manual pipeline job)

What are the relevant issue numbers?

Closes #45502 (closed)