bug(scrolling): Opening dialog in window virtual scroll break scrolling

### 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

[cdk-virtual-scroll-viewport[scrollWindow]](https://material.angular.io/cdk/scrolling/api#CdkVirtualScrollableWindow) is empty when opening a `mat-dialog` if the window have been scrolled.

When the dialog is closed, everything returns to normal but the scroll is restored to top 0.

### Reproduction

Steps to reproduce:
1. Go to https://stackblitz.com/edit/angular-psylrc
2. Click on "open dialog" button of the 100th line

### Expected Behavior

The virtual scroll should not be influenced by dialog

### Actual Behavior

Virtual scroll container become empty and when the dialog is closed the items come back but the scroll is restored to 0

### Environment

- Angular: 15.0.2
- CDK/Material: 15.0.2
- Browser(s): any
- Operating System (e.g. Windows, macOS, Ubuntu): any

Inizia con la riproduzione StackBlitz collegata e analizza l’interazione tra cdk-virtual-scroll-viewport[scrollWindow] e mat-dialog dopo aver effettuato lo scorrimento fino alla riga 100. Riproduci il viewport vuoto e il ripristino dello scorrimento a 0, quindi verifica che l’apertura e la chiusura della finestra di dialogo lascino lo scroll virtuale popolato nella posizione originale.

Scritto dal modello di indicizzazione a partire dal testo della issue.