Update Grafana, Loki, and Prometheus to latest versions

[jpswinski]

We are not taking advantage of improvements in the latest versions of these tools. This will require updates to both the AMI (packer configuration file) as well as the monitor Dockerfile.

For Loki, see https://grafana.com/docs/loki/latest/setup/upgrade/

For Prometheus, see https://prometheus.io/docs/prometheus/latest/migration/

For Grafana, see https://grafana.com/docs/grafana/latest/breaking-changes/