Option to disable response override

[Elorucov]

By default, AutoValidation always writes validation error into response in JSON format, which is unnacceptable when you need to return an HTML-page with errors (that contains elements with asp-validation-for tag helpers).

The DontOverrideResult property in AutoValidationMvcConfiguration prevents the validation error message from being written that happens in the FluentValidationAutoValidationActionFilter class.