Inform user about questionable hook success

app/controllers/projects/hooks_controller.rb

@@ -27,8 +27,10 @@ class Projects::HooksController < Projects::ApplicationController
     if !@project.empty_repo?
       status, message = TestHookService.new.execute(hook, current_user)
-      if status
-        flash[:notice] = "Hook successfully executed, HTTP #{status} #{message}"
+      if status && status >= 200 && status < 400
+        flash[:notice] = "Hook executed successfully"
+      elsif status
+        flash[:alert] = "Hook executed successfully but returned HTTP #{status} #{message}"
       else
         flash[:alert] = "Hook execution failed: #{message}"
       end