Add new app - If you are adding repository from custom provider that means we won't be able to register the SSH key

At add new app page if you wanted to add a repository from a custom git server (for which we don’t have a built in API integration) the “register SSH key automatically” option was still present.

It was quite misleading to display the option of automatic registration there, as can’t auto register the SSH key for a service without API integration, and in order to avoid any misunderstanding we are going to hide this option in this case.