Speed up static analisys & provide config for fully autoladed version

Add new extension-mage-autoload.neon to run stan without static refle…

…ction

This extension provides 2 configs:
extension-mage-autoload.neon (without static reflection,
Mage is autoloaded and executed)
extension.neon (Mage.php is not executed thanks to the static reflection)
Both modes now run with similar performance, thanks to the config cacheing.