Specify listen address

[eyusupov]

Summary

Allow specifying listen address for ArgoCD components.

Motivation

When using ArgoCD with mTLS through side-car proxy, it's enough to listen only on the loopback interface. Listening on the all interfaces might expose plain text connection to other pods.

Proposal

Add a new --address command line argument to argocd-server and argocd-repo-server. Also, add --metrics-address parameter to allow exposing metrics independently. Allow setting these arguments through environment variables too.

See #11846 for the current implementation