🐛 [BUG]漏斗图meta formater不生效

### 🐛 Bug description [Please make everyone to understand it]
`meta.formater`在折线柱状等图中都是正常的, 在XY轴取值的时候都会取formater处理之后的值. 但是在漏斗图中, 只有图例会取formater之后的值

> Please provide a link by forking these links [G2Plot](https://codesandbox.io/s/g2plot-issue-template-gzfdq?file=/index.ts) or GitHub repo, a minimal reproduction.

* _Required_ **Link to minimal reproduction**:
https://codesandbox.io/s/bitter-shape-puoz1o?file=/index.ts
### 📷 Step to reproduce

### 🏞 Expected result

### 🚑 Any additional [like screenshots]

* **G2Plot Version**:
* **Platform**:

Start with the linked CodeSandbox minimal reproduction and compare the funnel chart's handling of meta.formater with the line and column chart examples described in the issue. Trace how funnel data values and labels are formatted, then verify that the formatted value appears wherever the reproduction expects it, not only in the legend.

Written by the indexing model from the issue text.