Kibana health check through API endpoint doesn't work anymore

Issue

We're trying to monitor the kibana service (as we used to do in previous versoins) and the problem is when we try to curl the URL, we get the redirect response to the login page:

$ curl -k -H "Authorization: Bearer $(oc whoami -t)" -H "X-Proxy-Remote-User: $(oc whoami)" -H "X-Forwarded-For: 127.0.0.1" https://kibana.redhat.com/api/status -v

< HTTP/1.1 302 Found
< Content-Type: text/html; charset=utf-8
[...]
<a href="https://kibana.redhat.com/oauth/authorize?approval_prompt=force&amp;client_id=kibana-proxy&amp;redirect_uri=https%3A%2F%2Fkibana.redhat.com%2Foauth%2Fcallback&amp;response_type=code&amp;scope=user%3Ainfo+user%3Acheck-access+user%3Alist-projects&amp;state=757a6a76a8fd047ce76c9552861a8504%3A%2Fapi%2Fstatus">Found</a>.