[Bug] 当 type:' tree' 且 edgeShape: 'polyline' 时，不支持具体连接线属性的配置，但是edgeShape:'curve'却支持。

### Version

5.4.1

### Link to Minimal Reproduction

https://echarts.apache.org/examples/zh/editor.html?code=PYBwLglsB2AEC8sDeAoWsDOBTAThLGAXLANqrrpgCeIWxARGDllvQDRoVYAmA5lgGUAFgENaxAOQhgAGyoyI0LBNgcKsbiLAjiZTuugiAtnVj0cwYGHb6KAYyEQZ3ZtF3l1FQyYYBhR86wAII2nvYBLlhupLbqSLCxnt6m9AAyWCIAZrC-oWEUCkoC1DJ0Hvn2ssA4hBLM3BJqFRTU4hKaGEI8EonqAL69FIN9bAkVSMkM6VmwACL0fQC6iSPIg5Nm_k7csABCeWEO2666g-jxG2kZ2QDi9LCrZ8iwl9PZABILg8thS7ZLTXQMhEACMsDJiOUKNIMBBIDAGHheEJrP9OH8-kA&_source=echarts-doc-preview

### Steps to Reproduce

我想要实现在 edgeShape:'polyline'时，tree的lineStyle支持每一条连接线的配置。

1. edgeShape:'curve'时，是支持lineStyle的配置的，链接如下：https://echarts.apache.org/examples/zh/editor.html?code=PYBwLglsB2AEC8sDeAoWsDOBTAThLGAXLANqrrpgCeIWxARGDllvQDRoVYAmA5lgGUAFgENaxAOQBjAK44AblgmwOFWNxFgRxMpzXQRAWzqx6OYMDDs9FKUIgAbbs2g7yaigeMMAwvaewAILWHrb-zliupDZqSLAxHl4m9AAyWCIAZrA-IaEUDhDQgtQOdO55tsAOwDiEEszcEqoVFNTiEhoYQjwSCWoAvn0UQ_1s8RVISQxpmbAAIvT9ALoJo8hDU6Z-jtywAEK5oXY7LjpD6HGbqelZAOL0sGvnyLBXM1kAEotDK6HLNstmugHCIAEZYBzEcoUEDADAQSAwBh4XhCKwAzj_fpAA&_source=echarts-doc-preview
2. edgeShape:'polyline'时，不支持lineStyle的配置的，链接如下：https://echarts.apache.org/examples/zh/editor.html?code=PYBwLglsB2AEC8sDeAoWsDOBTAThLGAXLANqrrpgCeIWxARGDllvQDRoVYAmA5lgGUAFgENaxAOQhgAGyoyI0LBNgcKsbiLAjiZTuugiAtnVj0cwYGHb6KAYyEQZ3ZtF3l1FQyYYBhR86wAII2nvYBLlhupLbqSLCxnt6m9AAyWCIAZrC-oWEUCkoC1DJ0Hvn2ssA4hBLM3BJqFRTU4hKaGEI8EonqAL69FIN9bAkVSMkM6VmwACL0fQC6iSPIg5Nm_k7csABCeWEO2666g-jxG2kZ2QDi9LCrZ8iwl9PZABILg8thS7ZLTXQMhEACMsDJiOUKNIMBBIDAGHheEJrP9OH8-kA&_source=echarts-doc-preview

### Current Behavior

当前版本中，当 edgeShape:'polyline'时，data中的lineStyle不支持配置。

### Expected Behavior

当 edgeShape:'polyline'时，data中的lineStyle支持配置，可以完全控制连接线的属性（颜色，类型等）

### Environment

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

### Any additional comments?

_No response_

Start by reproducing the two linked ECharts examples with tree edgeShape set to curve and polyline, then trace the tree-series handling of per-node data lineStyle for each shape. The issue is done when polyline connections honor the configured line properties, including color and type, consistently with curve connections, with regression coverage for the reported reproduction.

Written by the indexing model from the issue text.