Fixes #37824 - Hide taxonomies from parts of api documentation

Some resources like user groups, external user groups, and architectures
are not scoped by taxonomies, yet the the api endpoints associated with
these resources accept the `organization-id` and `location-id` options.
I didn't observe any effect of these options on the api call, except for
when trying to create an external user group and providing either
organization-id or location-id, which causes the action to fail with an
error appearing in the logs:
`undefined method external_usergroups for #<{Organization/Location}: ...`

I have not, however, found any simple way of fixing this. All `Api::V2`
controllers inherit from `Api::V2::BaseController`, where the taxonomy
options are added through the `resource_description` method from Apipie.
While this method can be overridden in child classes, there appears to
be no way (at least I have not found such a way) of removing a parameter
once it is added.

The most correct solution would be of course to create a child class
inheriting from BaseController, provide the resource description with
taxonomy options there, and then have all taxonomy-scoped resource
controllers inherit from it. The problem is that there are many plugins
in which the controllers inherit from BaseController that would all need
to be updated as well. I see too much potential for breaking because of
a relatively harmless bug, so in my opinion the risk is not worth to fix
the issue this way.

Hence, I propose a partial solution. Hide the taxonomy options from the
API documentation of the relevant resources. Hammer can also be updated
to not display options with the `show => false` flag set.

This would not completely solve the issue but in my opinion has the best
effort/result/risk reduction ratio.

app/controllers/api/v2/architectures_controller.rb

@@ -3,6 +3,8 @@ module V2
     class ArchitecturesController < V2::BaseController
       include Foreman::Controller::Parameters::Architecture
 
+      hide_taxonomy_options
+
       before_action :find_optional_nested_object
       before_action :find_resource, :only => %w{show update destroy}
 

app/controllers/api/v2/base_controller.rb

@@ -168,6 +168,13 @@ def render_error(error, options = { })
         render options.merge(:template => "api/v2/errors/#{error}",
                              :layout   => 'api/v2/layouts/error_layout')
       end
+
+      def self.hide_taxonomy_options
+        resource_description do
+          param :location_id, Integer, :show => false
+          param :organization_id, Integer, :show => false
+        end
+      end
     end
   end
 end

app/controllers/api/v2/external_usergroups_controller.rb

@@ -4,6 +4,8 @@ class ExternalUsergroupsController < V2::BaseController
       include Api::Version2
       include Foreman::Controller::Parameters::ExternalUsergroup
 
+      hide_taxonomy_options
+
       before_action :find_resource, :only => [:show, :update, :destroy, :refresh]
       before_action :find_required_nested_object, :only => [:index, :show, :create]
       after_action :refresh_external_usergroup, :only => [:create, :update, :destroy]

app/controllers/api/v2/settings_controller.rb

@@ -1,6 +1,8 @@
 module Api
   module V2
     class SettingsController < V2::BaseController
+      hide_taxonomy_options
+
       before_action :find_resource, :only => %w{show update}
 
       def_param_group :setting_params do

app/controllers/api/v2/usergroups_controller.rb

@@ -3,6 +3,8 @@ module V2
     class UsergroupsController < V2::BaseController
       include Foreman::Controller::Parameters::Usergroup
 
+      hide_taxonomy_options
+
       before_action :find_optional_nested_object
       before_action :find_resource, :only => %w{show update destroy}