Ensure that authorization requests only request a dataset once

[erlendoksvoll]

Description

If the same data set is requested multiple times it will generate a server error from AuthorizationRequestValidatorService
var requirements = _evidenceCodesFromRequest.ToDictionary(es => es.EvidenceCodeName, es => es.AuthorizationRequirements);

Doing this should generate a validation error with a descriptive error message

Note: The error we saw was due to two datasets being registered in a plugin with the same name which caused a myriad of problems, but that is harder to avoid in design-time

Additional Information

No response

Tasks

No response