Need to plumb the `PBENCH_REDIS_SERVER` variable all the way through to `pmproxy.conf` and visualizer container

[portante]

Looks like we have a hard-coded setting for where the Redis server is in the pmproxy.conf and the visualizer container.

The Tool Data Sink's pmproxy.conf file should be rendered with the host/port redis server passed to the pbench-tool-data-sink, and the visualizer container entry point should also accept those parameters like pbench-tool-data-sink-ep does.