Adds a test to CI to build OpenTurbine through Spack and then build/r… #764

Job	Run time
Correctness-MacOS (g++, Release, all)	23m 43s
Correctness-MacOS (g++, Release, none)	25m 57s
Correctness-MacOS (g++, Debug, all)	22m 43s
Correctness-MacOS (g++, Debug, none)	25m 13s
Correctness-MacOS (clang++, Release, all)	22m 25s
Correctness-MacOS (clang++, Release, none)	27m 1s
Correctness-MacOS (clang++, Debug, all)	25m 3s
Correctness-MacOS (clang++, Debug, none)	20m 3s
	3h 12m 8s

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