fix: Authentication level claim is 0 in dialog token (#1654)

## Description

Changed IdportenAuthLevelClaim constant to fix parsing of Acr field in
dialog token

## Related Issue(s)

- #1458 

## Verification

- [x] **Your** code builds clean without any errors or warnings
- [x] 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/Authentication/AuthenticationBuilderExtensions.cs

@@ -1,6 +1,7 @@
 using Microsoft.IdentityModel.Tokens;
 using Microsoft.AspNetCore.Authentication.JwtBearer;
 using System.Diagnostics;
+using System.IdentityModel.Tokens.Jwt;
 
 namespace Digdir.Domain.Dialogporten.GraphQL.Common.Authentication;
 
@@ -22,6 +23,10 @@ public static IServiceCollection AddDialogportenAuthentication(
 
         services.AddSingleton<ITokenIssuerCache, TokenIssuerCache>();
 
+        // Turn off mapping InboundClaims names to its longer version
+        // "acr" => "http://schemas.microsoft.com/claims/authnclassreference"
+        JwtSecurityTokenHandler.DefaultMapInboundClaims = false;
+
         var authenticationBuilder = services.AddAuthentication();
 
         foreach (var schema in jwtTokenSchemas)

src/Digdir.Domain.Dialogporten.WebApi/Common/Authentication/AuthenticationBuilderExtensions.cs

@@ -1,6 +1,7 @@
 using Microsoft.IdentityModel.Tokens;
 using Microsoft.AspNetCore.Authentication.JwtBearer;
 using System.Diagnostics;
+using System.IdentityModel.Tokens.Jwt;
 
 namespace Digdir.Domain.Dialogporten.WebApi.Common.Authentication;
 
@@ -24,6 +25,10 @@ public static IServiceCollection AddDialogportenAuthentication(
 
         services.AddSingleton<ITokenIssuerCache, TokenIssuerCache>();
 
+        // Turn off mapping InboundClaims names to its longer version
+        // "acr" => "http://schemas.microsoft.com/claims/authnclassreference"
+        JwtSecurityTokenHandler.DefaultMapInboundClaims = false;
+
         var authenticationBuilder = services.AddAuthentication();
 
         foreach (var schema in jwtTokenSchemas)