[Bug] Symbol doesn't appear on polyline

### Version

5.5.0

### Link to Minimal Reproduction

https://echarts.apache.org/examples/en/editor.html?code=PYBwLglsB2AEC8sDeAoWsAeBBDEDOAXMmurALYTREAMANCemQIYZECMdDsIweEkMIgHIwoIfVKwW-ADKUApkVST0eABbAA7kQBmTADZ55XAL4TYZkgE8c-JVwpVYnSc1awOJS6vkAnCPKEsADaXMoqYFYgirBC-gp44lzoosD6kCD2KqTqWroGRskW5pIAJkxgTESh2ejhtbAAxsDAvqVBNQ2kwWy0HgC6JV3BAEx9I4NF2cEALH0ArJNd3QAcfSv9U6SbDSZFSyp4VmQARmnVQtAw8uKxTL6-WkIHkjz6VvHQMWC-AK7yQ1UxzO-gAyhAAF4xDiApotNqUCryUFWPBgeRkYSNe7ovhMaAjUpJbKfZGRfQxeoqTQQUpgNREMZbZr6VrCE76JiNADWxNqoC5_Cs7CKe0kYtgmxMAG4gA

### Steps to Reproduce

1. Create series of type 'lines', set 'polyline' to true
2. Add symbol

### Current Behavior

No symbol appears on line when polyline is set to true.

### Expected Behavior

Symbol(s) should appear at two ends of line as specified in 'symbol' array.

### Environment

```markdown
- OS: Windows 10
- Browser: Chrome 122.0.6261.129
- Framework: Angular
```

### Any additional comments?

_No response_