fix: Show billing upgrade page if there is a mismatch in the user count (#11886)

Disable features/show billing upgrade for accounts with more users than
the one in the license.

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

enterprise/app/controllers/enterprise/api/v1/accounts_controller.rb

@@ -65,7 +65,10 @@ class Enterprise::Api::V1::AccountsController < Api::BaseController
     {
       'conversation' => {},
       'non_web_inboxes' => {},
-      'agents' => {},
+      'agents' => {
+        'allowed' => @account.usage_limits[:agents],
+        'consumed' => agents(@account)
+      },
       'captain' => @account.usage_limits[:captain]
     }
   end