[2.x] feat(install): support queue configuration in installer file

[imorland]

Summary

Closes #4469.

FileDataProvider now reads a queue key from the JSON/YAML installer config file and passes it through to StoreConfig via Installation. Previously the queue config in config.php was always hardcoded to ['driver' => 'sync'], requiring a manual post-install edit for any other driver.

Usage

{
  "baseUrl": "https://example.com",
  "databaseConfiguration": { "..." },
  "queue": {
    "driver": "database"
  }
}

Omitting the queue key defaults to ['driver' => 'sync'], preserving existing behaviour.

Changes

• FileDataProvider — reads queue from config, defaults to ['driver' => 'sync']
• Installation — adds queueConfig(array $queue): self fluent method
• StoreConfig — accepts queue config as constructor param (default ['driver' => 'sync']), uses it in buildConfig() instead of hardcoded value

Test plan

• Install with a config file containing "queue": {"driver": "database"} and verify config.php contains the correct queue config
• Install without a queue key and verify config.php still defaults to sync