Remove Drupal Console dependencies and references.

[ndouglas]

Description

Drupal Console as a project may be dead, or near enough. It's not compatible with Drupal 9, the latest commits to the main repo are from a couple of months ago, and this recent pulse check issue has attracted no attention as far as I can tell.

We don't use Drupal Console -- at all, since it doesn't work anymore -- but it'd be good to find and expunge any remaining references to the project. It's just cruft at this point.

Acceptance Criteria

• Existing dependencies on Drupal Console have been removed.
• Documentation has been scoured of any references to Drupal Console.

CMS Team

Please leave only the team that will do this work selected. If you're not sure, it's fine to leave both selected.

• Platform CMS Team
• Sitewide CMS Team