Improve layout of SUSHI error messages displayed in report info modal

Current situation:

The report info modal shows an info text unsuccesfully harvested reports. 

Currently, there is no distinction between standard conformant SUSHI error codes and other errors, like HTTP errors (or problems within the folio app), see screenshot.

Scope of this feature:

For standard conformant SUSHI error codes, the displayed info text should have a better layout:

Info

SUSHI exception: Requestor is not authorized to access usage for institution (2010)

All other errors should, for now, remain unchanged:

Info

Report not valid: "Error"

Additional info:

The "Error code" filter dropdown already does display the error codes in the required layout. These codes are also part of the translation, the same language keys should be used.