[prometheus] Support for ingressClassName in > Kubernetes 1.18 #507
Description
Is your feature request related to a problem? Please describe.
The annotation kubernetes.io/ingress.class will be deprecated. See https://kubernetes.io/docs/concepts/services-networking/ingress/#deprecated-annotation
Describe the solution you'd like
Support for the ingressClassName field for prometheus server and alertmanager ingress.
Similar to #265