As per https://github.com/ARM-software/workload-automation/issues/968
the current documentation for detailing the naming scheme for an revent
recording is unclear. Reword the descriptions focusing on the typical
usecase rather then based on a customized target class.
Now allows for specifying a `group` value for each section which will
cross product the sections within that group with the sections in each
other group. Additionally classifiers will automatically be added to
each job spec with the relevant group information.
Restructure the documentation to be split into `User Information` and
`Developer Information`, and split the how to guides into their
corresponding section.
