Move user deletion to worker (#15586)

* WIP(delete): remove business logic from controller

* fix(deletion): handle group leave logic on app server still

* fix(lint): unused import

* fix(import): bracket syntax

* fix(test): adapt test for worker flow

* fix(deletion): update delete/feedback form copy

* fix(text): don't break to new paragraph about Gems

* fix(deletion): remove orphaned chat messages

* Revert "fix(deletion): handle group leave logic on app server still"

This reverts commit 9db541f4c3.

* fix(tests): remove tests
These can potentially be tested in the worker's suite? They target functionality that the group leave route handles within the deletion flow

* fix(lint): no-undef

* refactor redis setup into own file and use ioredis

* use bullmq directly to schedule jobs

* add space

* add key prefix

* add semicolon

* fix(jobs): update redis package

---------

Co-authored-by: Phillip Thelen <phillip@habitica.com>

website/server/controllers/api-v4/members.js

@@ -1,4 +1,4 @@
-import { sendJob } from '../../libs/worker';
+import worker from '../../libs/worker';
 import { authWithHeaders } from '../../middlewares/auth';
 import { ensurePermission } from '../../middlewares/ensureAccessRight';
 import { TransactionModel as Transaction } from '../../models/transaction';
@@ -48,7 +48,8 @@ api.deleteMember = {
     req.checkQuery('deleteAmplitude').optional().isIn(['true', 'false']);
     const validationErrors = req.validationErrors();
     if (validationErrors) throw validationErrors;
-    sendJob('delete-user', {
+    await worker.sendJob('deleteUser', {
+      identifier: req.params.memberId,
       data: {
         userId: req.params.memberId,
         deleteAccount: req.query.deleteAccount === 'true',