Nightly unit tests, linux #628

Job	Run time
Nightly 3.8 git-test-automl	16m 19s
Nightly 3.8 git-test-modelunderstanding	10m 16s
Nightly 3.8 git-test-other	10m 11s
Nightly 3.8 git-test-parallel	4m 30s
Nightly 3.8 git-test-prophet	6m 14s
Nightly 3.9 git-test-automl	16m 58s
Nightly 3.9 git-test-modelunderstanding	10m 14s
Nightly 3.9 git-test-other	9m 38s
Nightly 3.9 git-test-parallel	4m 59s
Nightly 3.9 git-test-prophet	6m 22s
	1h 35m 41s

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