Horizontal navigation: add right side icon to nav item

[Kristelx]

We would like to be able to choose the icon position on the right side,
currently it can only be set to the left.
In some cases, it is necessary to add the north_east icon to the link, for example.

[karolin-kivisikk]

Lisatud: https://www.figma.com/design/jWiRIXhHRxwVdMSimKX2FF/TEDI-READY-2.29.41?node-id=33421-141352&t=5cgtwk6ucW7ECANT-4