Automated Drupal 11 compatibility fixes for Collapsiblock

@chandu7929 it would seem you ran your script against something other than 4.x-dev as the core_version_requirement has been up to date since the 23rd of March on the dev branch.

I acknowledge the other two failures, but could you please:

1. present the issue summary in a more human-readable form, and
2. actually target the development branch

Thank you, @darvanen. I have run a scan against the dev branch, and there is only one issue being reported by the upgrade_status module. Also, I have updated the issue descriptions.

Thanks @chandu7929, I appreciate the update.

I have created MR with required changes, hence requesting review.

The 'next major' PHPUnit tests are failing due to #3444792: Prepare for PHPUnit 10 → which is not at all related to this work, so I'm happy to say this looks like it's done. Thank you!

Automatically closed - issue fixed for 2 weeks with no activity.