[EC-151] Hide Subscription/Billing information for Provider-managed organizations (#777)

* add canManageBilling permission and hasProvider helper method

common/src/enums/permissions.ts

@@ -24,4 +24,5 @@ export enum Permissions {
   EditAssignedCollections,
   DeleteAssignedCollections,
   ManageSso,
+  ManageBilling,
 }

common/src/models/domain/organization.ts

@@ -181,4 +181,12 @@ export class Organization {
   get isExemptFromPolicies() {
     return this.canManagePolicies;
   }
+
+  get canManageBilling() {
+    return this.isOwner && (this.isProviderUser || !this.hasProvider);
+  }
+
+  get hasProvider() {
+    return this.providerId != null || this.providerName != null;
+  }
 }