[PM-25379] Refactor org metadata (#6418)

* ignore serena

* removing unused properties from org metadata

* removing further properties that can already be fetched on the client side using available data

* new vnext endpoint for org metadata plus caching metadata first pass

including new feature flag

# Conflicts:
#	src/Core/Constants.cs

* [PM-25379] decided against cache and new query shouldn't use the service

* pr feedback

removing unneeded response model

* run dotnet format

src/Api/Billing/Controllers/OrganizationBillingController.cs

@@ -38,9 +38,7 @@ public class OrganizationBillingController(
             return Error.NotFound();
         }
 
-        var response = OrganizationMetadataResponse.From(metadata);
-
-        return TypedResults.Ok(response);
+        return TypedResults.Ok(metadata);
     }
 
     [HttpGet("history")]