Add a GH action for deploying and verifying dashboards & alerts load OK with quickstart

[david-martin]

Testing will be automated & deploys the dashboards & alerts somewhere.
Suggesting a github action that runs if dashboard or alert files change.
See comment here for suggestion on APIs to confirm dashboards and alerts have loaded ok.

[ehearneRedHat]

Potential checklist

• Run quickstart and see what dashboards and alert rules are loaded, and manually verify if they loaded in correctly.
• After verifying what a successful 'load in' looks like, investigate how to create a github action that verifies whether the current dashboard and alert rules load in correctly.
  • Run quickstart and check for success message before proceeding on.
  • Once success, check for all dashboard and alerts having a 'success' status.
  • If failure, list the failed dashboard and alerts, explaining why they failed.
  • Try to make this happen through a list that does not need to be inputted manually. (create a script that checks the contents of examples/alerts (* .yaml) and examples/dashboards (* .json) )
  • Use the HTTP API of both Grafana and Prometheus to check for dashboard names and alert names respectively.