Tooltip 在分类字段为数值型字段时，显示不全

[visiky]

• [x] I have searched the issues of this repository and believe that this is not a duplicate.

Reproduction link

Steps to reproduce

https://codesandbox.io/s/sandiantu-tooltip-wenti-gthc8?file=/index.ts

Environment	Info
g2	4.1.20
System	-
Browser	-

• [ ] close: https://github.com/antvis/G2Plot/issues/2001

[visiky]

似乎和这个问题是一样的：https://github.com/antvis/G2Plot/issues/2601 复现地址：https://codesandbox.io/s/tooltip-bugs-bs73i?file=/index.ts

[visiky]

目前看来，Tooltip shared 不作用于散点图，后续看下是否要支持

[hustcc]

应该 G2 也不太会支持，散点图。暂时关闭了，已经记录下来了。