enterprise/stages/source: fix Source stage not executing authentication/enrollment flow #27842

Job	Run time
lint-golint	1m 24s
test-unittest	4m 20s
ci-outpost-mark	3s
build-binary (proxy, linux, amd64)	1m 53s
build-container (proxy)	2m 56s
build-binary (proxy, linux, arm64)	1m 53s
build-container (ldap)	2m 37s
build-binary (ldap, linux, amd64)	3m 26s
build-container (radius)	2m 55s
build-binary (ldap, linux, arm64)	1m 50s
build-container (rac)	2m 30s
build-binary (radius, linux, amd64)	1m 55s
build-binary (radius, linux, arm64)	1m 56s
build-binary (rac, linux, amd64)	2m 1s
build-binary (rac, linux, arm64)	1m 46s
	33m 25s

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