Function create_file_purger

pub fn create_file_purger(
    scheduler: SchedulerRef,
    sst_layer: AccessLayerRef,
    cache_manager: Option<CacheManagerRef>,
    file_ref_manager: FileReferenceManagerRef,
) -> FilePurgerRef

Creates a file purger based on the storage type of the access layer. Should be use in combination with Gc Worker.

If the storage is local file system, a LocalFilePurger is created, which deletes the files from both the storage and the cache.

If the storage is an object store, an ObjectStoreFilePurger is created, which only manages the file references without deleting the actual files.