Make vite tool shed client proxy configurable #29752

Job	Run time
build-client / build-client	9m 23s
setup-selenium / setup_chromedriver	7s
Test (3.8, 0)	40m 57s
Test (3.8, 1)	53m 11s
Test (3.8, 2)	50m 26s
	2h 34m 4s

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