ApplicationParquetCleaner Refactor

[Aryex]

We should look into refactoring ApplicationParquetCleaner as currently, we hook a new callback into Spark for each export made during reading. A long-running application could register a large number of callbacks. Unclear if this would create a performance issue (eg: max number of callbacks) but it could be better designed.

Also, note that the name ApplicationParquetCleaner is now outdated and should be changed as we also support JSON files for reading operations.