Empower users to bring their own storage and file sources #26997

Job	Run time
build-client / build-client	11m 52s
setup-selenium / setup_chromedriver	4s
Test (3.8, 0)	43m 10s
Test (3.8, 1)	52m 59s
Test (3.8, 2)	51m 3s
	2h 39m 8s

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