Support Roaring-backed bitsets

Add BitsetView support for dense, live Roaring, and frozen Roaring filters, including count updates, dense conversion, offsets, and out-id mapping.

Preserve Roaring filters through search setup instead of rebuilding dense views, and add a typed Faiss fast path that expands Roaring filters into valid ID arrays for fp16, bf16, and int8 exhaustive distance paths.

Wire roaring into Conan and CMake dependencies and cover live and frozen Roaring bitsets with unit tests.

Signed-off-by: Hieu Pham <hieu.pham@reddit.com>

Merge pull request #8 from reddit/charles-njoroge/v2.6.15-brute-force

RDDT: Brute force support in HNSW

RDDT: Add more metrics to HNSW search path

RDDT: Add more metrics to HNSW search path

bump milvus-common and cardinalv1 version (zilliztech#1659)

* bump milvus-common version

Signed-off-by: Shawn Wang <shawn.wang@zilliz.com>

* bump cardinalv1 version

Signed-off-by: Shawn Wang <shawn.wang@zilliz.com>

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Signed-off-by: Shawn Wang <shawn.wang@zilliz.com>

release knowhere for milvus 2.6.8

release cardinal v2.6.6 for milvus 2.6.6

release knowhere for milvus 2.6.6

release knowhere for milvus v2.5.20

release knowhere v2.6.4 for milvus 2.6.4