Detect `MockRenderFactory` outside of `beforeAll` or `beforeEach`

in this case we should provide `install()`.

```ts
describe('', () => {
  const factory = MockRenderFactory(TargetComponent);

  beforeAll(() => factory.install());

  it('', () => {
    const fixture = factory(); // should do own install or throw if it isn't possible with the suggestion to use `.install()`.
  });
});
```