feat(coral): Enable superadmin to access coral

[programmiri]

Description

User with role SUPERADMIN should be able to access Coral. The change will be done in multiple steps behind a feature flag.

Changes needed

Note: This is a in-between solution. We want to have routing and views based on a more fine-grained permission model. Implemenations should be made in a way that they are easy to do / remove / changed to permissions later.

FE

• Show superadmin specific navigation (feat(coral): Add route filter and updated navigtion for superadmin behind feature flag #2303)
• update routing based on userrole (feat(coral): Add route filter and updated navigtion for superadmin behind feature flag #2303)
• remove the top level nav quick action links for superadmins (feat(coral): Don't show request button and notification for superadmin #2426)
• remove feature flag
• Add "coral interface available" preview banner in Klaw for superadmins

BE

• add navigation guards to make sure superadmins can't do any actions they shouldn't be able to do and get good error messages about it