Handle role filter when booting accessories

Filter the accessory hosts via KAMAL.accessory_hosts, which correctly
handles role and host filters.

Fixes: https://github.com/basecamp/kamal/issues/935

lib/kamal/cli/accessory.rb

@@ -275,11 +275,7 @@ class Kamal::Cli::Accessory < Kamal::Cli::Base
     end
 
     def accessory_hosts(accessory)
-      if KAMAL.specific_hosts&.any?
-        KAMAL.specific_hosts & accessory.hosts
-      else
-        accessory.hosts
-      end
+      KAMAL.accessory_hosts & accessory.hosts
     end
 
     def remove_accessory(name)