[Bug] tooltip setting rich and formatter is invalid

### Version

5.3.2

### Link to Minimal Reproduction

https://echarts.apache.org/examples/zh/editor.html?c=area-basic

### Steps to Reproduce

配置项设置 tooltip:{
trigger:"axis",
renderMode: "richText",
rich: {
a:{
color:'#fff'
}
},
formatter:'{a|测试样式}',
},

### Current Behavior

tooltip样式未修改

### Expected Behavior

tooltip样式修改为红色

### Environment

```markdown
- OS:
- Browser:
- Framework:
```

### Any additional comments?

设置tooltip的formatter与rich属性，结果没有生效rich样式。