Rename anomaly_base::register_mixables_to_holder to register_mixables and use same argument type as those of other algorithms
Move recommender of lof from storage to algorithm and separate MIX operations of recommender and lof
Add mixable_lof_storage and use it from lof instead of mixable_anomaly_storage
Remove mixable of nearest_neighbor table from light_lof.

Instead now nearest_neighbor table is MIXed via mixable table owned by nearest_neighbor itself.
Remove anomaly_storage_base