Add ingress for rewriting Keycloak requests from /auth to / #778

Job	Run time
editorconfig	5s
linting (lint_jsonnet)	7s
test (builtin)	55s
golden (builtin)	21s
test (builtin-auth-rewrite)	55s
golden (builtin-auth-rewrite)	24s
test (external)	56s
golden (external)	23s
test (openshift)	54s
linting (lint_yaml)	8s
golden (openshift)	21s
test (openshift-auth-rewrite)	55s
linting (lint_adoc)	9s
golden (openshift-auth-rewrite)	23s
test (openshift-postgres)	55s
golden (openshift-postgres)	23s
	8m 14s

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