Make LFS file locking use the same DB table than File Locking feature
Right now we use separate tables for LFS file locking and the File Locking feature.
Given these features are very similar with the main difference that File Locking has a UI to lock/unlock a file we should consider using a single table in order to avoid some DB complexity and also try to reuse some code.
This change should consider two important things:
- Migrate the data from the LFS file locking table to the table used by File Locking.
- Backport to CE the necessary changes.