Add path helper #23

Job	Run time
Test Linux OpenBLAS static binaries from build workflow	11s
Build and run ctests on Linux (openblas)	5m 58s
Build and run ctests on Linux (mkl)	10m 21s
Test Linux MKL binaries from build workflow	4m 38s
Test Windows MKL binaries from build workflow	20m 9s
Test macOS static binaries from build workflow	21s
Test Windows OpenBLAS binaries from build workflow	30m 13s
Build and run ctests on Windows (mkl)	27m 23s
	1h 39m 14s

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