divide tests into folders #821

Job	Run time
build (ubuntu-latest, 3.9, 8.1)	45s
build (ubuntu-latest, 3.13, 8.1)	47s
build (ubuntu-latest, 3.9, 8.2)	51s
build (ubuntu-latest, 3.13, 8.2)	52s
build (ubuntu-22.04, 3.7, 8.1)	51s
build (ubuntu-latest, 3.13, latest)	1m 3s
build (ubuntu-latest, 3.9, latest)	1m 1s
build (ubuntu-22.04, 3.7, 8.2)	54s
build (ubuntu-22.04, 3.7, latest)	1m 10s
fossa-scan / Run fossa scan on repository	42s
fossa-scan / Fetch fossa results	1m 51s
	10m 47s

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