fix(auth): Split values when checking EndUser scopes (#1764)

<!--- Provide a general summary of your changes in the Title above -->

## Description

<!--- Describe your changes in detail -->

## Related Issue(s)

- #1675

## Verification

- [ ] **Your** code builds clean without any errors or warnings
- [ ] Manual testing done (required)
- [ ] Relevant automated test added (if you find this hard, leave it and
we'll help out)

## Documentation

- [ ] Documentation is updated (either in `docs`-directory, Altinnpedia
or a separate linked PR in
[altinn-studio-docs.](https://github.com/Altinn/altinn-studio-docs), if
applicable)

src/Digdir.Domain.Dialogporten.GraphQL/Common/Authorization/AuthorizationOptionsSetup.cs

@@ -36,7 +36,7 @@ public void Configure(AuthorizationOptions options)
             {
                 var userScopes = context.User
                     .FindAll(AuthorizationPolicyBuilderExtensions.ScopeClaim)
-                    .Select(s => s.Value)
+                    .SelectMany(s => s.Value.Split(" "))
                     .ToList();
 
                 return userScopes.Contains(AuthorizationScope.EndUser) ||

src/Digdir.Domain.Dialogporten.WebApi/Common/Authorization/AuthorizationOptionsSetup.cs

@@ -32,7 +32,7 @@ public void Configure(AuthorizationOptions options)
             {
                 var userScopes = context.User
                     .FindAll(AuthorizationPolicyBuilderExtensions.ScopeClaim)
-                    .Select(s => s.Value)
+                    .SelectMany(s => s.Value.Split(" "))
                     .ToList();
 
                 return userScopes.Contains(AuthorizationScope.EndUser) ||