FIX: Follow up fixes for password-reset error page (#18794)

* FIX: Follow up fixes for password-reset error page

Pass in `base_url` to the template
Use `.html_safe` since the message now contains html

Follow up to: 9b1536fb833f00a1625fe198964e90a32bb5bc71

* Update specs to pass in the base_url

app/controllers/users_controller.rb

@@ -1895,7 +1895,7 @@ class UsersController < ApplicationController
       @user = User.find(user_id) if user_id > 0
     end
 
-    @error = I18n.t('password_reset.no_token') if !@user
+    @error = I18n.t('password_reset.no_token', base_url: Discourse.base_url) if !@user
   end
 
   def respond_to_suspicious_request