Better group plan member counts (#10449)

* fix(group-plans): improved member count accuracy

* fix(migration): don't leave server running after completion

* fix(migration): don't update Stripe for non-Stripe methods
Also fixes a linting issue.

* fix(lint): no comma dangle here

* fix(async): put async token in relevant spot

* fix(lint): still more linting

* fix(async): better handling for async and promises
Also adds additional logging where discrepancies are found.

* feat(migration): provide CSV output

* fix(promises): better pause/resume

* fix(migration): don't update already canceled subs

* fix(groups): also address quantity/memberCount discrepancies

* fix(migration): also log quantity issues

* fix(migration): equation was reversed

* refactor(migration): condense logic, add error catch

* fix(migration): fix root cause of failed quantity update??

* fix(lint): gratuitous parens

* fix(test): expect group to be updated db-side

* fix(migration): actually update quantities?

* fix(groups): roll back unneeded Stripe lib change, refactor migration

config.json.example

@@ -112,5 +112,6 @@
       "CLOUDKARAFKA_USERNAME": "",
       "CLOUDKARAFKA_PASSWORD": "",
       "CLOUDKARAFKA_TOPIC_PREFIX": ""
-    }
+    },
+    "MIGRATION_CONNECT_STRING": "mongodb://localhost:27017/habitrpg?auto_reconnect=true"
 }