Change galaxy system user uid for K8s image #31140

Job	Run time
build-client / build-client	10m 32s
setup-selenium / setup_chromedriver	7s
Test (3.8, 0)	38m 47s
Test (3.8, 1)	48m 34s
Test (3.8, 2)	46m 3s
	2h 24m 3s

Provide feedback