🐛 [BUG]双轴图单击事件只能获取到一个轴的数据

[Bernicechl]

🐛 Bug description [Please make everyone to understand it]

双轴图单击事件只能获取到一个轴的数据

Please provide a link by forking these links G2Plot or GitHub repo, a minimal reproduction.

• Required Link to minimal reproduction:

📷 Step to reproduce

1.实现双周图 2.编写双周图单击事件，并输出 3.

🏞 Expected result

当前元素下的两个轴的数据

🚑 Any additional [like screenshots]

• G2Plot Version:
• Platform: