feat: Enable FusionCache AutoClone (#1550)

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

## Description

<!--- Describe your changes in detail -->
Enables
[AutoClone](ZiggyCreatures/FusionCache#279)
feature in FusionCache
## Related Issue(s)

- #1226 

## 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)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Introduced a new property, `EnableAutoClone`, in the caching
configuration to enhance cache management.
- **Bug Fixes**
- Activated the assignment of an empty list to the `SubParties`
property, ensuring no sub-parties are included in the authorized parties
result.
- **Style**
- Minor formatting adjustments made for improved readability in the
caching configuration.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

src/Digdir.Domain.Dialogporten.Infrastructure/Altinn/Authorization/AltinnAuthorizationClient.cs

@@ -121,9 +121,7 @@ void Flatten(AuthorizedParty party, AuthorizedParty? parent = null)
 
             if (parent != null) party.ParentParty = parent.Party;
 
-            // TODO: https://github.com/digdir/dialogporten/issues/1533
-            // Disabling this for now, fixes https://github.com/digdir/dialogporten/issues/1226
-            // party.SubParties = [];
+            party.SubParties = [];
 
             flattenedAuthorizedParties.AuthorizedParties.Add(party);
         }

src/Digdir.Domain.Dialogporten.Infrastructure/InfrastructureExtensions.cs

@@ -340,7 +340,9 @@ private static IServiceCollection ConfigureFusionCache(this IServiceCollection s
                 // This will stop deserialization exceptions to be re-thrown, which will cause the factory to run as if
                 // the cache entry was not found. This avoids crashes which otherwise would happen if entities that
                 // are cached are changed in a way that makes them incompatible with the cached version.
-                ReThrowSerializationExceptions = false
+                ReThrowSerializationExceptions = false,
+
+                EnableAutoClone = true
             })
             .WithRegisteredSerializer()
             // If Redis is disabled (eg. in local development or non-web runtimes), we must instruct FusionCache to