Summary:
Expose the `set_direct_map_type` method of binary IVF indexes via the C API. This enables support for the `index.set_direct_map_type` API in languages other than Python.
Pull Request resolved: https://github.com/facebookresearch/faiss/pull/5451
Reviewed By: alibeklfc
Differential Revision: D114681970
Pulled By: mnorris11
fbshipit-source-id: 1342eeb225d6fd9fdea76c6b9417cedde55c1d3a
