MB-10789: [4] Bloomfilters on compaction

Create/resize bloom filters during compaction.
Time_purge_hook callback of compaction that
iterates over all keys will be responsible for
populating the bloomfilter with all the necessary
keys.

Change-Id: I8f30488599f426324bac28a973ae006b6d1454c0
Reviewed-on: http://review.couchbase.org/41860
Reviewed-by: Chiyoung Seo <chiyoung@couchbase.com>
Tested-by: abhinav dangeti <abhinav@couchbase.com>