Simplify using helper methods in components

The `use_helpers` method was added in ViewComponent 3.8.0, and it's
included by default in all components since version 3.11.0.

Note we sometimes delegated the `can?` method to the controller instead
of the helpers, for no particularly reason. We're unifying that code as
well.

app/components/admin/organizations/table_actions_component.rb

@@ -1,5 +1,5 @@
 class Admin::Organizations::TableActionsComponent < ApplicationComponent
-  delegate :can?, to: :controller
+  use_helpers :can?
   attr_reader :organization
 
   def initialize(organization)