[test] split tests into files #50

Job	Run time
build (Release, windows-latest, clang, clang++)	2m 40s
build (Release, windows-latest, gcc, g++)	2m 9s
build (Release, ubuntu-latest, clang, clang++)	1m 0s
build (Release, ubuntu-latest, gcc, g++)	45s
build (Release, macos-latest, clang, clang++)	43s
build (Release, macos-latest, gcc, g++)	31s
build (RelWithDebInfo, windows-latest, clang, clang++)	1m 37s
build (RelWithDebInfo, windows-latest, gcc, g++)	2m 12s
build (RelWithDebInfo, ubuntu-latest, clang, clang++)	51s
build (RelWithDebInfo, ubuntu-latest, gcc, g++)	43s
build (RelWithDebInfo, macos-latest, clang, clang++)	35s
build (RelWithDebInfo, macos-latest, gcc, g++)	34s
build (MinSizeRel, windows-latest, clang, clang++)	2m 13s
build (MinSizeRel, windows-latest, gcc, g++)	1m 35s
build (MinSizeRel, ubuntu-latest, clang, clang++)	50s
build (MinSizeRel, ubuntu-latest, gcc, g++)	1m 4s
build (MinSizeRel, macos-latest, clang, clang++)	35s
build (MinSizeRel, macos-latest, gcc, g++)	35s
build (Release, windows-latest, cl, cl)	1m 35s
build (RelWithDebInfo, windows-latest, cl, cl)	1m 38s
build (MinSizeRel, windows-latest, cl, cl)	2m 16s
	26m 41s

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