Remove orphaned Stripe data from SQLite (#12704)

refs https://github.com/TryGhost/Team/issues/476

* Moved paid subscription events population migration

This migration relies on the members_stripe_customers and
members_stripe_customer_subscriptions tables having no orphaned records
in order for it to correcly generate its data.

The migration to clean up orphaned records in those tables has not been
implemented yet, moving this migration free's up the "14" slot

* Removed orphaned stripe data from SQLite3

SQLite databases do not handle removing orphaned stripe records after a
member has been deleted. Our migration to populate the paid subscription
events relies on each customer and subscription being associated with a
member.

core/server/data/migrations/versions/4.0/14-remove-orphaned-stripe-records.js

@@ -0,0 +1,35 @@
+const {createIrreversibleMigration} = require('../../utils');
+const logging = require('../../../../../shared/logging');
+
+module.exports = createIrreversibleMigration(async function up(connection) {
+    if (connection.client.config.client === 'mysql') {
+        logging.info('Skipping removal of orphaned stripe records for MySQL');
+        return;
+    }
+
+    logging.info('Removing orphaned rows from members_stripe_customers');
+    await connection.raw(`
+        DELETE FROM
+            members_stripe_customers
+        WHERE
+            member_id
+        NOT IN (
+            SELECT
+                id
+            FROM members
+        );
+    `);
+
+    logging.info('Removing orphaned rows from members_stripe_customers_subscriptions');
+    await connection.raw(`
+        DELETE FROM
+            members_stripe_customers_subscriptions
+        WHERE
+            customer_id
+        NOT IN (
+            SELECT
+                customer_id
+            FROM members_stripe_customers
+        );
+    `);
+});