Remove action from captcha points form before removing the action entity.

In recaptcha v3 entity delete form (ReCaptchaV3ActionDeleteForm.php), check if the action entity that is going to be deleted are not configured in any of the captcha point form as captcha type. This will solve coding standard warning "Possible useless method overriding detected" on https://pareview.sh/pareview/https-git.drupal.org-project-recaptcha_v3.g... and most importantly ensures there are no orphan references to entity.