Support exposing multiple ports in a sidecar proxy.

#### Feature Description

Add feature so that consul proxy can serve multiple services via single proxy. Currently via envoy or consul only a single service can be served via a proxy.

#### Use Case(s)

Consider a pod consists of multiple containers, each container listens to a specific port. Currently via connect only one service per pod can be served. Instead of creating one proxy per service, if a single proxy can handle multiple services it would reduce resource consumption and simplify the design.