bug(MatTable): Text-color are no longer taken from the predefined foreground palette

### Is this a regression?

- [X] Yes, this behavior used to work in the previous version

### The previous version in which this bug was not present was

14

### Description

After the angular material 15 update, the component text colors are no longer taken from the predefined foreground palette. In the past there was taken from the text and secondary-text variable.

Is there a new smart way to force the use of specific text-colors? Or is it not advisable to use your own font colors?

### Reproduction

https://stackblitz.com/run?file=src%2Fapp%2Ftable-basic-example.ts

### Expected Behavior

Its possible to use the foreground color palette to customize the text-color.

```scss
$theme-foreground-palette: (
base: color.$grey-700,
divider: color.$dividers,
dividers: color.$dividers,
disabled: color.$disabled-text,
disabled-button: color.$grey-400,
disabled-text: color.$disabled-text,
elevation: color.$grey-700,
hint-text: color.$disabled-text,
secondary-text: color.$secondary-text, // <-- was also used for mat-header-cells
icon: color.$primary-text,
icons: color.$primary-text,
text: color.$primary-text, // <-- was also used for mat-cells
slider-min: color.$grey-700,
slider-off: color.$grey-200,
slider-off-active: color.$grey-300,
);
```

### Actual Behavior

Some parts from the foreground palette will affect in the theme for the app. But in lists, tables or options there is always used the color `rgba(0, 0, 0, 0.87)`.

### Environment

- Angular: 15.0.2
- CDK/Material: 15.0.1

Beginne mit der verknüpften StackBlitz-Reproduktion, insbesondere mit src/app/table-basic-example.ts, und vergleiche das Theme-Verhalten von Angular Material 14 und 15. Verfolge, wie die Werte für Text und sekundären Text der Vordergrundpalette die Tabellenzellen und -überschriften erreichen; abgeschlossen ist die Aufgabe, wenn die konfigurierte Palette diese Farben anstelle von rgba(0, 0, 0, 0.87) steuert.

Vom Indexierungsmodell aus dem Issue-Text verfasst.