`aliases.drushrc.php.stub` is not PHP 8 compatible

[Leksat]

Describe the bug

There is a comparison happening here: https://github.com/uselagoon/lagoon/blob/9f9c6cbf6fcd66819829074ade5b404cd5a0050f/services/drush-alias/web/aliases.drushrc.php.stub#L41

In PHP 8 it works in a different way: https://3v4l.org/PMomq (because of this change in PHP 8)

To Reproduce

Steps to reproduce the behavior:

1. Get a project using the stub file (https://github.com/amazeeio/drupal-setting-files/blob/master/Drupal8/drush/aliases.drushrc.php)
2. Upgrade the project to PHP 8

Drush aliases do not work.

Expected behavior

Drush aliases work.

Additional context

The stub file is not needed on projects using https://github.com/amazeeio/drupal-integrations, but will provide a PR anyway.

[tobybellwood]

code change is
if ( (int)DRUSH_VERSION >= 9 ) {