bug(material/chip): Mdc Chip Grid empties all options when using Reactive Forms and focusing out

### 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

14.2.6

### Description

Having Reactive forms attached to `mat-chip-grid` which accepts an array of object values, clears them on focus out.

### Reproduction

Steps to reproduce:
1. Create a formgroup with some formControl
2. Bind it to ` `
3. Add some new options (or the same works if the list is already populated) that are **arrays of objects**.
4. Focus out of the component

https://stackblitz.com/edit/angular-6g9jz1?file=src%2Fapp%2Fchips-input-example.ts,src%2Fapp%2Fchips-input-example.html

Upon further investigation, figured that the core problem is that on focus out, object values are transformed to strings hence why we don't see the name property. Nevertheless objects were not transformed in v 14.


_Note:_ In the Docs Chip list works as expected because it is not bound to Reactive forms

### Expected Behavior

All options remain with previously defined object values

### Actual Behavior

All options are transformed to strings thus we have empty text options

### Environment

- Angular: 15.0.4
- CDK/Material: 15.0.3
- Browser(s): Chrome 108.0.5359.124
- Operating System: macOS Ventura 13.1

Comienza con la reproducción vinculada de StackBlitz, especialmente con src/app/chips-input-example.ts y src/app/chips-input-example.html, e inspecciona cómo se vincula mat-chip-grid con Reactive Forms usando arrays de objetos. Reproduce el comportamiento al perder el foco y verifica después que las opciones conserven sus valores de objeto y su texto visible.

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