Add hicSparse backend to sparse matrix multiply. #603

Job	Run time
ci (Release, linux gnu-10)	5m 36s
ci (Release, linux gnu-12)	5m 42s
ci (Release, linux gnu-7)	5m 17s
ci (Release, linux clang-12)	5m 43s
ci (Release, linux intel)	7m 41s
ci (Release, linux intel-classic)	8m 11s
ci (Release, macos)	4m 55s
ci (Debug, linux gnu-10)	5m 37s
ci (Debug, linux gnu-12)	5m 40s
ci (Debug, linux gnu-7)	5m 25s
ci (Debug, linux clang-12)	5m 28s
ci (Debug, linux intel)	7m 14s
ci (Debug, linux intel-classic)	7m 38s
ci (Debug, macos)	5m 16s
	1h 25m 23s

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