[Web][Restic][Dovecot][Dockerapi] Add restic backups with restore in the UI

- Scheduled, encrypted backups to S3, SFTP, REST or a local folder (new restic-mailcow container)
- Restore of mailboxes and whole domains in the UI, also deleted ones, for admins and domain admins
- Scope set by RESTIC_BACKUP_MODE in mailcow.conf (all, data, config)
- Optional backup before updates (update.sh), helper-scripts/restic.sh for a full restore

tests/php/Backup/Legacy/NoTemplatesTest.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Mailcow\Tests\Backup\Legacy;
+
+use Mailcow\Backup\Legacy\NoTemplates;
+use Mailcow\MailboxGroup\Repository\LookupRepository;
+use Mailcow\MailboxGroup\Service\TemplateService;
+use PHPUnit\Framework\TestCase;
+
+class NoTemplatesTest extends TestCase
+{
+    public function testARestoredMembershipAppliesNoGroupTemplate(): void
+    {
+        $lookup = $this->createMock(LookupRepository::class);
+        // the mailbox gets a group with a template
+        $lookup->method('effectiveTemplates')->willReturn(['anna@firma.de' => 'Vertrieb']);
+        $lookup->method('mailboxNames')->willReturn(['anna@firma.de' => 'Anna']);
+
+        // the legacy mailbox code is never called (it is not loaded in the tests)
+        $this->assertSame([], (new TemplateService($lookup, new NoTemplates()))->applyChanged(['anna@firma.de' => null]));
+    }
+}