Add legacy job submission fallback #41609

Job	Run time
build-client / build-client	4m 45s
setup-selenium / setup_chromedriver	6s
Test (3.10, 1)	50m 49s
Test (3.10, 2)	53m 12s
Test (3.10, 0)	47m 4s
	2h 35m 56s

Provide feedback