[AC-1607] Add offboarding survey to subscription pages (#7809)

* Add offboarding survey to subscription pages

* Cleaning up unused code

* Removing unused eslint suppression

* Product updates

* Jared's feedback

libs/common/src/billing/abstractions/billilng-api.service.abstraction.ts

@@ -0,0 +1,9 @@
+import { SubscriptionCancellationRequest } from "../../billing/models/request/subscription-cancellation.request";
+
+export abstract class BillingApiServiceAbstraction {
+  cancelOrganizationSubscription: (
+    organizationId: string,
+    request: SubscriptionCancellationRequest,
+  ) => Promise<void>;
+  cancelPremiumUserSubscription: (request: SubscriptionCancellationRequest) => Promise<void>;
+}