Bug 34587: Add access_type and yop to the reports viewer

Bug 34587: Add access_type and yop to the reports viewer

Some report types include access_type and yop headers for each usage statistics

The hierarchy is as follows: yop - access_type - metric_type
I.e. for each yop there are report lines for access_type and then for each access_type there are also report lines for metric types

This patch adds helper functions to populate the report rows based on this hierarchy and the report data retrieved from the database

Signed-off-by: Jessica Zairo <jzairo@bywatersolutions.com>
Signed-off-by: Michaela Sieber <michaela.sieber@kit.edu>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>