Build: Bump actions/download-artifact from 4 to 7 (#2956) #7551

Job	Run time
integration-test-gcs	1m 23s
integration-test-s3	1m 28s
integration-test-adls	1m 31s
lint-and-unit-test (3.11)	2m 48s
lint-and-unit-test (3.12)	3m 13s
integration-test	10m 40s
lint-and-unit-test (3.10)	3m 9s
lint-and-unit-test (3.13)	2m 49s
integration-coverage-report	37s
	27m 38s

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