Update mglaman/drupal-check to ^1.4 in test composer.json and make code updates

[pyrello]

Motivation

As part of #2, we sidestepped this issue by specifically pinning to a version of mglaman/drupal-check to less than 1.4, which is the version that introduces changes to the checking that will necessitate code updates for tests to continue passing.

Proposed solution

• Update mglaman/drupal-check to ^1.4 in the test composer.json.
• Run drupal-check command locally.
• Make code updates based on recommendations.