* [Columnar] Build columnar.so and let citus depends on it
Co-authored-by: Yanwen Jin <yanwjin@microsoft.com>
Co-authored-by: Ying Xu <32597660+yxu2162@users.noreply.github.com>
Co-authored-by: jeff-davis <Jeffrey.Davis@microsoft.com>
* Columnar: fix misnamed file.
* Columnar: make compression not dependent on columnar.h.
* Columnar: rename columnar_metadata_tables.c to columnar_metadata.c.
* Columnar: make customscan not depend on columnar.h.
Co-authored-by: Jeff Davis <jefdavi@microsoft.com>