Build

Extract PQ4 kernels to includable headers in impl/pq_4bit/ #4359

Job	Run time
build-pull-request / Linux x86_64 (cmake)	21m 45s
build-pull-request / Format	38s
build-release	0s
build-pull-request / Linux x86_64 AVX2 (cmake)	19m 35s
build-pull-request / Linux x86_64 Dynamic Dispatch (cmake)	27m 23s
build-pull-request / Linux x86_64 AVX512 (cmake)	35m 20s
build-pull-request / Windows x86_64 (conda)	24m 19s
build-pull-request / Linux x86_64 AVX512_SPR (cmake)	35m 12s
build-pull-request / Linux arm64 (conda)	1h 53m 50s
build-pull-request / Linux x86_64 GPU (cmake)	44m 5s
build-pull-request / Linux x86_64 w/ SVS (cmake)	22m 12s
build-pull-request / Linux arm64 SVE (cmake)	20m 37s
build-pull-request / Linux x86_64 (conda)	25m 31s
build-pull-request / Linux arm64 Dynamic Dispatch (cmake)	19m 2s
build-pull-request / Index serialization backward compatibility / CMake Write -> Conda Read	25m 12s
build-pull-request / Linux x86_64 GPU w/ cuVS (cmake)	1h 47m 40s
build-pull-request / Index serialization backward compatibility / Conda Write -> CMake Read	24m 13s
	9h 26m 34s

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