bug: ion-label does not apply ellipsis when the text is too long

### Prerequisites

- [X] I have read the [Contributing Guidelines](https://github.com/ionic-team/ionic-framework/blob/main/docs/CONTRIBUTING.md#creating-an-issue).
- [X] I agree to follow the [Code of Conduct](https://ionicframework.com/code-of-conduct).
- [X] I have searched for [existing issues](https://github.com/ionic-team/ionic-framework/issues) that already report this problem, without success.

### Ionic Framework Version

v8.x

### Current Behavior

ion-label does not ellipsis when the text is multi-line. This wrong behavior appears in the docs

### Expected Behavior

The Ionic v6 docs are ok

### Steps to Reproduce

1. Create a ion-item.
2. Add a ion-label
3. Insert a long text

### Code Reproduction URL

https://ionicframework.com/docs/api/label

### Ionic Info

Ionic:

Ionic CLI : 7.2.0
Ionic Framework : @ionic/angular 8.4.0
@angular-devkit/build-angular : 19.0.3
@angular-devkit/schematics : 19.0.3
@angular/cli : 19.0.3
@ionic/angular-toolkit : 12.1.1

Capacitor:

Capacitor CLI : 6.1.2
@capacitor/android : 6.1.2
@capacitor/core : 6.1.2
@capacitor/ios : 6.1.2

Utility:

cordova-res : not installed globally
native-run : 2.0.1

System:

NodeJS : v18.20.2 (/Users/israel/.volta/tools/image/node/18.20.2/bin/node)
npm : 10.5.0
OS : macOS Unknown

### Additional Information

_No response_

Start with the ion-label API documentation reproduction URL and reproduce the behavior using an ion-item, an ion-label, and long multiline text. Compare the v8 result with the v6 documentation screenshots; the work is done when the label applies ellipsis as expected in the documented case.

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