FIX: correctly shows as disabled a user who can't chat (#26010)

Prior to this fix we were checking if user was not part of a group which allows to chat, but we were not checking if this user was part of groups who can use direct messages.

plugins/chat/spec/integration/outgoing_web_hooks_spec.rb

@@ -4,6 +4,7 @@ RSpec.describe "Outgoing chat webhooks" do
   before do
     SiteSetting.chat_enabled = true
     SiteSetting.chat_allowed_groups = Group::AUTO_GROUPS[:everyone]
+    SiteSetting.direct_message_enabled_groups = Group::AUTO_GROUPS[:everyone]
   end
 
   describe "chat messages" do