Improve logic around major versions

[mglaman]

No description provided.

[mglaman]

this logic needs some extra eyes and sanity review

[mglaman]

This failed on 11.x-dev:

2024-03-07T04:16:33.272Z - 65e93f5c7dd073fbdae06ebb# /bin/sh -c cd "${DOCROOT}" && ../vendor/bin/drush si standard --db-url=mysql://tugboat:tugboat@mysql:3306/tugboat --account-name=admin --account-pass=admin -y
 You are about to:
 * Create a sites/default/settings.php file
 * DROP all tables in your 'tugboat' database.

 // Do you want to continue?: yes.                                              

 [notice] Starting Drupal installation. This takes a while.
 [notice] Performed install task: install_select_language
 [notice] Performed install task: install_select_profile
 [notice] Performed install task: install_load_profile
 [notice] Performed install task: install_verify_requirements
 [error]  The submitted value mysql in the Database type element is not allowed. 
 [warning] Undefined array key "host" Connection.php:132
 [warning] Undefined array key "username" Connection.php:165
 [warning] Undefined array key "password" Connection.php:165

In install.core.inc line 964:

It didn't have a base preview, I'm guessing, so something was missing

[mglaman]

Lagoon environment used a "dev" tugboat, so that may be a problem also. Looking into it more tomorrow