UHF-9682: Add cookie check for siteimprove to be able to see inside accordions

[teroelonen]

UHF-9682

What was done

• Add check to state.js for accordions that it a cookie helfi_accordions_open is set the accordions should all be open

How to install

• Make sure your instance is up and running on latest dev branch.
  • git pull origin dev
  • make fresh
• Update the HDBT theme
  • composer require drupal/hdbt:dev-UHF-9682
• Update the platform config
  • composer require drupal/helfi_platform_config:dev-UHF-9682
• Run make drush-updb drush-cr

How to test

• Go and find a page with accordions on the instance that you are testing the feature. The accordions should be closed by default when you load the page for the first time.
• Open inspector and go to set cookie helfi_accordions_open in the Application tab. You can set the value to true for example. Now refresh the page and the cookie shouldn't disappear like it would have before.
• Now when you refresh the page with accordions on it should have them all opened.
• There is one thing I am worried about here and it is varnish. I would like to make sure somehow that the cookie check result is not cached in varnish for regular people so if you have any idea how to make sure of that it is not, please do those checks as well.
• Check that code follows our standards

Designers review

• This PR does not need designers review

Other PRs

• UHF-9682: Add cookie check for siteimprove to be able to see inside accordions #919
• UHF-9682: Add cookie check for siteimprove to be able to see inside accordions drupal-helfi-platform-config#709

[Arkkimaagi]

Tested both before and after applying the changes, This works as it should, good job!

[github-actions]

⚠️ Visual regression found! Please check if this change is wanted or accidental. You can check the output here: https://city-of-helsinki.github.io/drupal-hdbt/pull/919/html_report/