Adopt new core templates and scaffold

[andypost]

Core added

• https://www.drupal.org/node/3041017
• https://www.drupal.org/node/3082474

https://www.drupal.org/docs/develop/using-composer/using-drupals-composer-scaffold

[andypost]

drupal-composer/drupal-project#522

[andypost]

Also https://www.drupal.org/node/3059717 will need work to adopt

[andypost]

https://www.drupal.org/project/drupal/issues/3108262

[andypost]

@davidferlay the only remaining issue is accepted for 9.2 core, it makes skilld-drupal-cleanup plugin useless

https://git.drupalcode.org/project/drupal/-/commit/216dc5c9507c817f068221f1741ba6aaf5cb419c