Fix query filters

lib/open_project/costs/engine.rb

@@ -347,7 +347,7 @@ module OpenProject::Costs
     end
 
     initializer 'costs.register_query_filter' do
-      Queries::WorkPackages::FilterRegister.register(OpenProject::Costs::WorkPackageFilter)
+      Queries::Register.filter Query, OpenProject::Costs::WorkPackageFilter
     end
 
     module EagerLoadedCosts

lib/open_project/costs/patches/query_patch.rb

@@ -88,8 +88,6 @@ module OpenProject::Costs::Patches::QueryPatch
 
                                labor_costs + material_costs
                              }))
-
-      Queries::WorkPackages::Filter.add_filter_type_by_field('cost_object_id', 'list_optional')
     end
   end
 

lib/open_project/costs/work_package_filter.rb

@@ -18,7 +18,7 @@
 #++
 
 module OpenProject::Costs
-  class WorkPackageFilter < Queries::WorkPackages::Filter::BaseFilter
+  class WorkPackageFilter < ::Queries::BaseFilter
     def values
       CostObject
         .where(project_id: project)