[Bug] symbolType.indexOf is not a function

### Version

5.x.x

### Link to Minimal Reproduction

Official website https://echarts.apache.org/examples/en/editor.html?c=radar-custom&version=5.0.0

codesandbox https://codesandbox.io/p/sandbox/customized-radar-chart-forked-4dxjk2

### Steps to Reproduce

### Current Behavior

symbol and symbolSize Not support function

### Expected Behavior

symbol and symbolSize should support function according to the documentation

### Environment

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

### Any additional comments?

_No response_