[Bug] Graph type with emphasis focus 'adjacency' - hovering on legend always highlights same nodes

### Version

5.6.0

### Link to Minimal Reproduction

https://echarts.apache.org/examples/en/editor.html?c=graph-label-overlap&code=LYTwwgFghgTgLgOgM4QPYHcAyqoBMCWAdgOYAUAlANwBQAJAsQKZwBSAygPIBypAShxwAqAfQAKAQUEAJAAQBqGQHIA9LihwoyqEiTNV6zQBtGSALTB8umFABGxpAgBWSVIUUAaGQDMAroQDGcPiuMqTE1gAOEOQyAN7UMjKgkLCIEPi4jNh4RGRUCTKoEUEhALxxBYlwqKiGQREAXHEAvu6VMsZMhLhNANrtifGJw8NqGk3hUFEI_uqMxKgw-CYIwFOkvgElhKFQMUMjhzDMPjA7UAiEUMCMNIfDzeQDMs3tALptI1bLSH3PB_crjcmopMCYZABZSyMax2EweZ5VEARRggyZRBH3RKGKAgVA-OAgwiuRiYrFjKATSIQS6oTJIT5YwxEADWvxk6JpzMIbMZ91mcHmix-VKmNIFQqWJj5RxwwCacBgPkYMpGOJsjEMTQBWJQGAVSpViOGEVQSHw2xBS2IEDgZKx3kWazggpgINiNmaimNrWN6s1mFx-MJFQdiXSmQ4ADcYTjGjJFcqfarhkhZsZMPgLCGdfcLIQmgAGBAAFhTIzWAA8mgAmZN-oiMNhwEDGbXGxL-WqLEEuU7-Unl4b-U4xwgmdnFgDM9YdjGAUW0lnbYcdI_ZijwjigA4CIG9Dte9yPwzeBWadyS4Gg8GQzA4xWChFIRW2-UelCAA

### Steps to Reproduce

1. hover on different legend items

### Current Behavior

A fixed set of nodes are highlighted no matter which legend item is hovered

### Expected Behavior

no highlight, or highlight the nodes with the same category to the legend item hovered

### Environment

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

### Any additional comments?