feat(material/slider): Support for multi word thumb label text

### Feature Description

In mat slider thumb label, need a support for multi word text. As we can format thumb label text by using **displayWith** property and add suffix or prefix to the number. We have a use case in which using value from mat-slider, we are creating labels like poor, below average, above average, etc. But in current implementation multi word label text is not supported. Words gets wrapped as we give space in the label text string.

### Use Case

We have used mat slider of range {min=0, max=10, step=01} for taking ratings from user
by using the mat slider value I am creating rating labels such as poor, below average, average, above average and excellent. As per the number I want to show that particular label in thumb label text.

[Stackblitz link](https://stackblitz.com/edit/sxcf47?file=src%2Fapp%2Fslider-formatting-example.html,src%2Fapp%2Fslider-formatting-example.css,src%2Findex.html,src%2Fstyles.scss,src%2Fapp%2Fslider-formatting-example.ts,package.json)

从链接的 StackBlitz 示例开始，重点查看 src/app/slider-formatting-example.html、src/app/slider-formatting-example.css 和 src/app/slider-formatting-example.ts，以复现格式化的 thumb 标签。跟踪 Angular Material slider thumb-label 的实现，并让包含多个单词的 displayWith 文本保持在同一个标签上；当“低于平均水平”之类的标签能够在不换行的情况下渲染时，即表示完成。

由索引模型根据 Issue 内容生成。