Include axe checks for open state of all individual widgets in `spec/features/issues/issue_sidebar_spec.rb`

While working on Include axe checks in `spec/features/issues/iss... (#434005 - closed) , it was realised that most of the sidebar widgets use old dropdowns and need to be refactored for the axe checks to pass

This is dependent on Migrate "app/assets/javascripts/sidebar/compone... (#413495)