Parsing data object does not allow for Array Label

### Expected behavior

When datasets contain data objects with keys, the configured label key (`xAxisKey`) should also allow for multiple lines using the array notation.

### Current behavior

When parsing data objects, labels on that object that are split into multiple lines using the `array` notation are not recognized.

I can enable the correct labels by adding a `labels` array. This will show the label, but the value for it is still not displayed.

### Reproducible sample

https://codepen.io/doekenorg/pen/raaNPvM

### Optional extra steps/info to reproduce

_No response_

### Possible solution

_No response_

### Context

_No response_

### chart.js version

v4.4.9

### Browser name and version

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### Link to your project

_No response_