Adds support for passing in `Binding` objects into `TestBed.createComponent`. This makes it easier to test components by avoiding the need to create a wrapper component. Furthermore, it keeps the behavior consistent between tests and the actual app. For example, given a custom checkbox that looks like this:

```typescript
@component({
  selector: 'my-checkbox',
  template: '...',
  host: {'[class.checked]': 'isChecked()'}
})
export class MyCheckbox {
  isChecked = input(false);
}
```

A test for the `isChecked` input would look something like this:

```typescript
it('should toggle the checked class', () => {
  @component({
    imports: [MyCheckbox],
    template: '<my-checkbox [isChecked]="isChecked"/>',
  })
  class Wrapper {
    isChecked = false;
  }

  const fixture = TestBed.createComponent(Wrapper);
  const checkbox = fixture.nativeElement.querySelector('my-checkbox');
  fixture.detectChanges();
  expect(checkbox.classList).not.toContain('checked');

  fixture.componentInstance.isChecked = true;
  fixture.detectChanges();
  expect(checkbox.classList).toContain('checked');
});
```

Whereas with the new API, the test would look like this:

```typescript
it('should toggle the checked class', () => {
  const isChecked = signal(false);
  const fixture = TestBed.createComponent(MyCheckbox, {
    bindings: [inputBinding('isChecked', isChecked)]
  });
  const checkbox = fixture.nativeElement.querySelector('my-checkbox');
  fixture.detectChanges();
  expect(checkbox.classList).not.toContain('checked');

  isChecked.set(true);
  fixture.detectChanges();
  expect(checkbox.classList).toContain('checked');
});
```