feat(checkbox): display as block when justify or alignment properties are defined (#29783)

- Change the checkbox's `display` property to `block` when the `justify` or `alignment` property is set.
- Set the default `justify-content` style to `space-between` so that a checkbox with `width: 100%` set without `justify` or `alignment` set will still have the same default
- Modifies the `label` e2e test to remove the explicit width as setting the property will make them full-width
- Adds two examples to the `label` e2e test of labels that do not have `justify` set but use `width: 100%` to ensure they are working as expected without it