Grant privileges and roles needed to read Heartbeat data from {{kib}} [kibana-user-privileges]

{{kib}} users typically need to view dashboards and visualizations that contain Heartbeat data. These users might also need to create and edit dashboards and visualizations.

To grant users the required privileges:

1. Create a reader role, called something like heartbeat_reader, that has the following privilege:

   Type	Privilege	Purpose
   Index	read on heartbeat-* indices	Read data indexed by Heartbeat
   Spaces	Read or All on Dashboards, Visualize, and Discover	Allow the user to view, edit, and create dashboards, as well as browse data.
   Spaces	Read or All on {{kib}} Uptime	Allow the use of {{kib}} Uptime

2. Assign the reader role, along with the following built-in roles, to users who need to read Heartbeat data:

   Role	Purpose
   monitoring_user	Allow users to monitor the health of Heartbeat itself. Only assign this role to users who manage Heartbeat.