add `DOWNLOAD` staging action #2438

Job	Run time
analytics (3.7)	3m 32s
linting	47s
analytics (3.8)	3m 18s
tests (3.7)	58s
analytics (3.9)	3m 31s
tests (3.8)	55s
analytics (3.10)	4m 20s
tests (3.9)	54s
analytics (3.11)	3m 42s
tests (3.10)	59s
analytics (3.12)	3m 41s
tests (3.11)	56s
tests (3.12)	56s
notebook_integration_test (3.10) / tests	2m 34s
notebook_integration_test (3.11) / tests	2m 23s
notebook_integration_test (3.12) / tests	2m 29s
notebook_integration_test (3.7) / tests	1m 57s
notebook_integration_test (3.8) / tests	2m 21s
notebook_integration_test (3.9) / tests	2m 23s
	42m 36s

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