chore: use https for dex route instead of h2 (redhat-appstudio#10394)

This commit aims to check if the annotation
`proxy.openshift.io/backend-protocol` set to `https` can handle the
health check from openshift ingress.

Jira KFLUXUI-1023

Author: JoaoPedroPP

components/konflux-ui/staging/base/route-and-oauth.yaml

@@ -24,7 +24,7 @@ kind: Route
 metadata:
   name: konflux-idp
   annotations:
-    proxy.openshift.io/backend-protocol: h2
+    proxy.openshift.io/backend-protocol: https
 spec:
   host: tba
   path: /idp