Move rocketship distribution to artifact based deploys

Attached merge request which:
- Updates .gitignore to ignore composer manged files
- Adds .gitlab-ci.yml.dist file, supporting artifact base deploy. Must be renamed .gitlab-ci.yml to leverage it
- Move dropsolid/ddev-drupal to require-dev section, and bump to ^0.7.0
- Disallow new "tbachert/spi" plugin (see https://www.drupal.org/node/3492353 → )