Added migration to remove deprecated values from the settings table (#11942)

refs https://github.com/TryGhost/Ghost/issues/10318
refs https://github.com/TryGhost/Ghost/pull/11939

- Removes force_i18n, permalinks, and members_session_secret settings
values as their respective use has been removed from the codebase.
- Related code changes in referenced PR

core/server/data/migrations/versions/3.22/01-removed-legacy-values-from-settings-table.js

@@ -0,0 +1,65 @@
+const ObjectId = require('bson-objectid');
+const logging = require('../../../../../shared/logging');
+
+module.exports = {
+    config: {
+        transaction: true
+    },
+
+    async up(options) {
+        const settingsKeys = ['force_i18n', 'permalinks', 'members_session_secret'];
+
+        logging.info(`Removing ${settingsKeys.join(',')} from "settings" table.`);
+
+        return await options
+            .transacting('settings')
+            .whereIn('key', settingsKeys)
+            .del();
+    },
+
+    async down(options) {
+        const currentTimestamp = options.transacting.raw('CURRENT_TIMESTAMP');
+
+        const forceI18nSetting = {
+            id: ObjectId.generate(),
+            key: 'force_i18n',
+            value: 'true',
+            type: 'blog',
+            created_at: currentTimestamp,
+            created_by: 1,
+            updated_at: currentTimestamp,
+            updated_by: 1
+        };
+
+        const permalinksSetting = {
+            id: ObjectId.generate(),
+            key: 'permalinks',
+            value: '/:slug/',
+            type: 'blog',
+            created_at: currentTimestamp,
+            created_by: 1,
+            updated_at: currentTimestamp,
+            updated_by: 1
+        };
+
+        const membersSessionSecretSetting = {
+            id: ObjectId.generate(),
+            key: 'members_session_secret',
+            value: null,
+            type: 'members',
+            created_at: currentTimestamp,
+            created_by: 1,
+            updated_at: currentTimestamp,
+            updated_by: 1
+        };
+
+        logging.info('Adding force_i18n, permalinks, and members_session_secret to "settings" table.');
+
+        return options.transacting('settings')
+            .insert([
+                forceI18nSetting,
+                permalinksSetting,
+                membersSessionSecretSetting
+            ]);
+    }
+};