add support for TLS for grpc connections

[pvsone]

It would be useful to support TLS on the grpc interface for the OPA-Envoy plugin. There are scenarios where an Envoy instance may want to communicate with OPA-Envoy, when OPA-Envoy is not deployed as a sidecar. In a non-sidecar model, where the traffic is over a shared network, it would be preferable for the traffic to be secured with TLS.

[stale]

This issue has been automatically marked as inactive because it has not had any activity in the last 30 days.

[umang5195]

I would like to open this issue to add support for TLS for grpc connections

[stale]

This issue has been automatically marked as inactive because it has not had any activity in the last 30 days.