Build

OpenMP bakcend implementation. #192

Job	Run time
build_mac	5m 19s
build_windows (BUILD_SHARED_LIBS=Off)	28m 10s
build_docker (clang13)	12m 23s
build_docker (gcc12)	11m 13s
build_docker (gcc13)	10m 7s
build_docker (rocm6)	20m 3s
build_docker (rocm6_desul)	22m 24s
build_docker (clang15)	11m 20s
build_docker (intel2024_sycl)	23m 19s
build_docker (intel2024_debug)	6m 57s
build_docker (intel2024)	7m 37s
	2h 38m 52s

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