bug(mat-radio-group): Programmatic changes are not reflected in the form model

### Description

When setting `value` on `matRadioGroup`, the visually selected radio button updates, but the form model does not.

Looking at the material source code, the form model is only updated (via `_controlValueAccessorChangeFn`) via the radio input's `change` event. Is this intentional?

### Reproduction

See Stackblitz: https://stackblitz.com/edit/angular-ivy-hpd53z?file=src%2Fapp%2Fapp.component.ts

Steps to reproduce:
1. Select a radio button by clicking it - observe that the form model updates accordingly
2. Select a radio button that is not green
3. Click the 'Force Green' button, which programmatically sets the `value` to green

### Expected Behavior

The `color` value in the form model updates

### Actual Behavior

The `color` value in the form model does not update

### Environment

- Angular: 13.2.0
- CDK/Material: 13.2.5
- Browser(s): Chrome
- Operating System: Windows

Start with the linked StackBlitz reproduction and the mat-radio-group source described in the issue, tracing how programmatic value changes reach the form model. Done means setting the group value to green updates the form model's color value, while the existing click behavior continues to work.

Written by the indexing model from the issue text.