[PM-14275] Add IsManaged to OrganizationMetadata (#4957)

* Add IsManaged to OrganizationMetadata

* Remove subscription requirement from self-host eligibility check

* Remove unused service

* Run dotnet format

src/Api/Billing/Models/Responses/OrganizationMetadataResponse.cs

@@ -4,10 +4,12 @@ namespace Bit.Api.Billing.Models.Responses;
 
 public record OrganizationMetadataResponse(
     bool IsEligibleForSelfHost,
+    bool IsManaged,
     bool IsOnSecretsManagerStandalone)
 {
     public static OrganizationMetadataResponse From(OrganizationMetadata metadata)
         => new(
             metadata.IsEligibleForSelfHost,
+            metadata.IsManaged,
             metadata.IsOnSecretsManagerStandalone);
 }