Make deleting with optimistic locking respect NULL

Make deleting with optimistic locking respect NULL

For now deleting with optimistic locking is broken when lock_version is still NULL, because Rails would try to delete with lock_version = 0 while in the database the column is still NULL.

The monkey patches would force Rails just pass whatever in the column, and stop Rails from casting NULL into 0 when the value is read from database.

Closes #24766 (closed)