test: fix stale and flaky tests

- Update tests whose expectations no longer matched intended changes
  (GitHub App redirect, wildcard domains, container IDs, nightly
  install folders, localhost metadata, Sentinel restart on save)
- Seed the instance settings the 2FA profile test needs
- Run the global Pest hooks for all test folders and release the
  Laravel application after each test, so tests do not leak state
- Replace a class alias mock that broke later tests
- Generate factory names that always pass name validation; Faker names
  with apostrophes or short words made form tests fail at random

tests/Unit/InstallScriptDirectoryPermissionsTest.php

@@ -40,7 +40,7 @@ function installScriptFileMode(string $path): string
 
 $installScripts = [
     'stable install' => ['scripts/install.sh', ['source', 'ssh', 'images']],
-    'nightly install' => ['other/nightly/install.sh', ['source', 'ssh']],
+    'nightly install' => ['other/nightly/install.sh', ['source', 'ssh', 'images']],
 ];
 $resourceDirectories = ['applications', 'databases', 'backups', 'services', 'proxy', 'sentinel'];