Add alerts for degraded status of Quay healthcheck endpoints

There should be prometheus alerts triggered in the Quay operator based deployment in case any of the Quay healthcheck endpoints mentioned in the doc are found to have degraded status.

https://docs.redhat.com/en/documentation/red_hat_quay/3.12/html/troubleshooting_red_hat_quay/health-check-quay#health-check-quay

This feature will benefit a large portion of the Quay customers.