Add rescoring support to OnDisk 4x Compression

[naveentatikonda]

Description

As of today we know that the disk based vector search provides good recall even with 32x compression(by trading off search latencies) except the 4x compression which uses Lucene engine behind the scenes and Faiss engine for all other compressions. We need to add rescoring support(like with Faiss) for Lucene during search which will help to improve the recall of 4x compression and make it at par with the recall of other compression levels.