OZG-5012 adjust getItems function - use other linkRel

alfa-client/libs/bescheid-shared/src/lib/bescheid.service.ts

...red/src/lib/resource/list-resource.service.itcase.spec.ts

...ech-shared/src/lib/resource/list-resource.service.spec.ts

...ibs/tech-shared/src/lib/resource/list-resource.service.ts

...lient/libs/tech-shared/src/lib/resource/resource.model.ts

...ent/libs/tech-shared/src/lib/resource/resource.service.ts