Include authentication method for Prometheus resiliency probe

[georginagi]

Although there is a way to configure a prometheus url when setting a resiliency probe based on prometheus metrics, there is no option to choose an authentication method. It would be good to have a way to authenticate using at least basic auth.

This is issue was filed after a conversation in the community slack https://kubernetes.slack.com/archives/CNXNB0ZTN/p1712575629724629?thread_ts=1712569891.556859&cid=CNXNB0ZTN