Summary:
`IndexShards_c.cpp` defines:
```cpp
DEFINE_GETTER(IndexShards, int, own_indices)
DEFINE_SETTER(IndexShards, int, own_indices)
```
while `IndexShards_c.h` defines
```cpp
FAISS_DECLARE_GETTER_SETTER(IndexShards, int, own_fields)
```
this mismatch causes neither `faiss_IndexShards_set_own_indices` and `faiss_IndexShards_set_own_fields` to be exported in the c_api. This patch completes the migration to `indices` instead of `fields` in the c_api.
Pull Request resolved: https://github.com/facebookresearch/faiss/pull/5165
Reviewed By: mnorris11
Differential Revision: D103238014
Pulled By: trang-nm-nguyen
fbshipit-source-id: 5a972cc6b6611088f06e3388677e0cd10d9037c0
Binozo
c5ddbc7104