[Feature] Ability to hide overlap in value labels in emphasis state

### Version

5.4.3

### Link to Minimal Reproduction

https://jsfiddle.net/s6mr0g8c/1/

### Steps to Reproduce

1. Create a multi-series line chart with many points
2. Set labelLayout to `hideOverlap`
3. Hover over one of the series names in the legend

### Current Behavior

On hovering the legend, labels for all points on the line appear, without any control for overlap


### Expected Behavior

Labels should stay the same as they are outside of emphasis state (or `hideOverlap` should apply in emphasis state)

### Environment

```markdown
N/A
```

### Any additional comments?

_No response_