bug(cdk/dialog): parent injector not working correctly

### 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

18

### Description

Tokens from the parent injector are not available.
The behaviour is different between a ngComponentOutlet and the injector added to dialog

### Reproduction

StackBlitz link: https://stackblitz.com/edit/stackblitz-starters-epebydgb
Steps to reproduce:
1.
2.

### Expected Behavior

Tokens from the parent injector are available

### Actual Behavior

Tokens from parent injector are not available

### Environment

```
_ _ ____ _ ___
/ \ _ __ __ _ _ _| | __ _ _ __ / ___| | |_ _|
/ △ \ | '_ \ / _` | | | | |/ _` | '__| | | | | | |
/ ___ \| | | | (_| | |_| | | (_| | | | |___| |___ | |
/_/ \_\_| |_|\__, |\__,_|_|\__,_|_| \____|_____|___|
|___/

Angular CLI: 19.0.0
Node: 18.20.3
Package Manager: npm 10.2.3
OS: linux x64

Angular: 19.0.0
... animations, build, cli, common, compiler, compiler-cli, core
... forms, platform-browser, router

Package Version
------------------------------------------------------
@angular-devkit/architect 0.1900.0
@angular-devkit/core 19.0.0
@angular-devkit/schematics 19.0.0
@angular/cdk 19.0.5
@schematics/angular 19.0.0
rxjs 7.8.1
typescript 5.6.3
zone.js 0.15.0
```

Comienza con la reproducción enlazada de StackBlitz y compara el comportamiento del parent injector de ngComponentOutlet con el injector añadido a cdk/dialog. Sigue los puntos de entrada relevantes del diálogo y del injector que se muestran en la reproducción. Se considera terminado cuando los tokens del parent injector están disponibles a través del diálogo como se espera.

Escrito por el modelo de indexación a partir del texto del issue.