lack of 'rocksdb_options_add_compact_on_deletion_collector_factory'

[AdjoiningCat]

hi，

I have a situation: 'seek' after many separate 'delete', the performance of 'seek' degrades very obvious.
I did some search, there are some ways may help with the problem:
1、use 'deleterange' instead of many separate 'delete', this can help reducing "delete tombstone" but can only be used at some specific scenario, mine is not fit
2、'compact' periodicaly, it helps getting a relatively stable performance, but may cause some impact on my other scenarios.
3、use a 'CompactOnDeletionCollectorFactory', it triggers compaction when the ratio of delete reachs the specified value, but it could not be found and set at the lastest version.

so, is there any plan to add the interface?