Make SearchBoxComponentService.getProductResults() public

[filipe-esposito-kci]

Is your feature request related to a problem? Please describe.
getProductResults() is a useful method from the SearchBoxComponentService on our case, as we benefit from the fact that it returns the whole productResults object, because we need the keywordRedirectUrl field (whereas in the public method getResults(), which itself calls getProductResults(), returns only productResults.products). But this method is protected. We therefore had to create a custom service that extends SearchBoxComponentService, just to re-create getProductResults() ourselves, which simply calls super.getProductResults(config).

If .getProductResults() was a public method, we wouldn't need to do this.

Describe the solution you'd like
getProductResults() is changed from protected to public.

Additional context
Version 5.2 of Spartacus.