Summary:
Hi,
the `c_api` is missing exports for the FaissScalarQuantizer scalar quantizer. I've added them.
Additionally I synced the `c_api/IndexScalarQuantizer_c.h` `FaissQuantizerType` enum with the cpp side which is required because `faiss_IndexScalarQuantizer_sq` may return an enum value which is not contained in the `c_api` enum definition.
Pull Request resolved: https://github.com/facebookresearch/faiss/pull/5477
Reviewed By: trang-nm-nguyen
Differential Revision: D114077316
Pulled By: mnorris11
fbshipit-source-id: 6c714a86daa20a490b3892c3a78356b7beebc92e