Build

Extract PQ4 kernels to includable headers in impl/pq_4bit/ #4385

Job	Run time
build-pull-request / Linux x86_64 (cmake)	21m 59s
build-pull-request / Format	36s
build-release	-1s
build-pull-request / Linux x86_64 GPU w/ cuVS (cmake)	1h 45m 16s
build-pull-request / Linux x86_64 AVX512_SPR (cmake)	35m 33s
build-pull-request / Linux x86_64 w/ SVS (cmake)	23m 17s
build-pull-request / Linux x86_64 (conda)	26m 10s
build-pull-request / Linux x86_64 AVX512 (cmake)	34m 49s
build-pull-request / Linux x86_64 AVX2 (cmake)	21m 3s
build-pull-request / Linux arm64 (conda)	1h 52m 42s
build-pull-request / Linux x86_64 GPU (cmake)	44m 58s
build-pull-request / Linux x86_64 Dynamic Dispatch (cmake)	26m 56s
build-pull-request / Linux arm64 SVE (cmake)	20m 30s
build-pull-request / Index serialization backward compatibility / CMake Write -> Conda Read	25m 4s
build-pull-request / Windows x86_64 (conda)	24m 3s
build-pull-request / Linux arm64 Dynamic Dispatch (cmake)	18m 59s
build-pull-request / Index serialization backward compatibility / Conda Write -> CMake Read	24m 23s
	9h 26m 17s

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