bug(dialog): Typing of new `MatDialogConfig.closePredicate`

### Is this a regression?

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

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

_No response_

### Description

#30919 introduced the new MatDialog config `closePredicate`. I am struggling to make typing work to have a 100% typed code.

### Reproduction

StackBlitz link: https://stackblitz.com/edit/9wtzaa17?file=src%2Fmain.ts

Steps to reproduce:
1. open link, it does not compile, but I expect to compile

### Expected Behavior

At first I expected that types would be flowing, so that I wouldn't need to repeat them. So my expected usage would be like:

```ts
this.dialog.open(
MyDialog,
{
closePredicate: (
result,
config,
componentInstance
) => {
return something();
},
}
);
```

But that failed to compile. So I tried to add typing like so:

```ts
this.dialog.open(
MyDialog,
{
closePredicate: (
result: MyDialogResult | undefined,
config: MatDialogConfig,
componentInstance: MyDialog | null
) => {
return componentInstance?.animal() !== 'my original data';
},
}
);
```

That also fail to compile. And I am out of ideas.

Angular Material source never use this callback with any parameters (neither in implementation, nor in tests).

What is the expected usage pattern here ? Is there a way to avoid repetition ?

### Actual Behavior

Stackblitz does not compile

### Environment

- Angular: 20.1
- CDK/Material: 20.1
- Browser(s): Chrome
- TypeScript: 5.8.3

Comienza con la reproducción vinculada de StackBlitz e inspecciona las definiciones de tipos de TypeScript para MatDialogConfig.closePredicate y dialog.open. Compara los parámetros de callback inferidos y anotados explícitamente con el uso esperado; se considera terminado cuando la reproducción compila con valores correctamente tipados para result, config y componentInstance.

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