WP110 #1191: Updated the uib_feide module to consume groups from Feide

The scope of the task has changed a bit since the issue was first created and part of the work was to remove and rewrite code for the previous assumptions we made.

uib_feide.module

@@ -58,6 +58,9 @@ enum Roles: string {
   case StudyProgramContributor = 'https://api.uib.no/names/roles/eksternweb/uibno_studies_and_students_author';
   case StudyProgramEditor = 'https://api.uib.no/names/roles/eksternweb/uibno_studies_and_students_manager';
 
+  /**
+   * Function mapping drupal roles to enum cases.
+   */
   public function getRole(): string {
     return match ($this) {
       Roles::StudyProgramContributor => 'study_program_contributor',