Allow modes `z` and `Z` for docker volumes #30014

Job	Run time
setup-selenium / setup_chromedriver	7s
build-client / build-client	9m 48s
Test (3.8, 0)	42m 25s
Test (3.8, 1)	53m 21s
Test (3.8, 2)	50m 24s
	2h 36m 5s

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