UHF-9787: Local storage cleanup

[teroelonen]

UHF-9787

What was done

• Add general purpose local storage manager and use it in closable announcements and accordions

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-9787
• Update the Helfi Platform config
  • composer require drupal/helfi_platform_config:dev-UHF-9787
• Run make drush-updb drush-cr

How to test

• Check that the accordion functionality that remembers what accordions you have opened even if you reload the page still works.
• Check that the announcement hiding functionality that hides the announcements that you have closed still works.
• Make sure that you get a new local storage row called helfi-settings that gets all the information above.
• Try breaking it a little since the functionality was heavily refactored.
• Try adding a local storage row 'hidden-helfi-announcements' and for example 'liikenne-accordion' if you are using KYMP to test the feature. Then refresh the page and check that the browser console says that the two local storage rows were removed. Check that they were actually removed as well.
• Check that code follows our standards

Continuous documentation

• This feature has been documented/the documentation has been updated
• This change doesn't require updates to the documentation

Other PRs

• UHF-9787: Local storage cleanup #961
• UHF-9787: Local storage cleanup drupal-helfi-platform-config#746

[rpnykanen]

Must update libraries.yml closable announcement version or this won't work. set 1.0 or 1.1

[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/961/html_report/