Unified Role description vs command printout mismatch

[mmattel]

Referencing:
#9727 (Enhancement: Unified Roles Management)
#9973 ([docs-only] Description + CLI for Unified Roles Management)
#10015 (fix: improve some wordings and cli table)

Issues:

• In 9727/9973, we describe in the graph readme roles using names like UnifiedRoleViewerID.
• In 10015, we add to the table printed by the CLI command the role name, but here we use e.g. Viewer.
• In 9727/9973 the printout has 9 roles, in 10015 it as 12 roles.

This is inconsistent and no one can match what belongs together.

Solution:
Stick to a namespace like UnifiedRole as the graph readme documents for the CLI printout and take care that no roles are missing in the graph readme.

@micbar @fschade