View Envoy and Agent Logs in Consul UI

#### Feature Description

A simple gRPC call from the consul servers to a node to retrieve the most recent logs from the consul and envoy agents.

This would allow the logs to be viewed in the UI for a particular node or service.

As a team that administers a consul deployment for many others to use, the limitation of not necessarily having access to another team's infrastructure to view their envoy and consul logs for troubleshooting can be quite troublesome, as well as for a service owner, this creates a QoL enhancement that does not require them to set up advanced log ingestion to view logs.

#### Use Case(s)

* Administrators troubleshooting service issues for service owners
* QoL for service owners investigating potentially bad nodes or envoy issues.

The issue names no files, tests, or entry points. Start by scoping how Consul servers could retrieve recent Consul and Envoy agent logs from a node through gRPC and expose them in the UI. Done means administrators and service owners can view those logs for a particular node or service.

Written by the indexing model from the issue text.